Spinach and Sautéed Veggie Casserole
This Spinach and Sautéed Veggie Casserole is the perfect way to use up any vegetables in the fridge. It is a versatile and family friendly dish, perfect for any night of the week!

Happy Thursday, I hope you are having a great week! My kids started back to school yesterday, so I started to tackle my massive "to do" list that grew exponentially over the summer. One of the items was cleaning out the refrigerator and freezer.
Check out some of my recent recipes using veggies from the garden!
We belong to a Community Supported Agriculture program, so we get a lot of fresh veggies every week. Unfortunately, this past week was so busy that I did not do as much cooking as I typically do. So, as I was cleaning out the fridge, I had a ton of fresh veggies that were on the brink of going bad. There was no way I wanted to throw any of them out, so I knew just what I needed to make for dinner, my Spinach and Sautéed Veggie Casserole
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This easy vegetarian dish has just 10 ingredients in it, however you can add or omit veggies to your liking!
- Extra Virgin Olive Oil
- Spinach
- Red Bell Pepper
- Orange Bell Pepper
- Onion
- Mushrooms
- Garlic
- Butter
- Cherry Tomatoes
- Cheddar Cheese
The spinach and sautéed veggie casserole is easy to prepare! Preheat the oven to 350 degrees, then heat up a pan and add olive oil. Next, add the spinach and sauté it until it is wilted. One thing to note is that 20 ounces of spinach is A LOT, the big container at the store or around 10 cups from the garden. The pan will be overflowing with the spinach at first, but it will cook down quickly. Once it is wilted, place it in the bottom of an 8x8 casserole dish that has been sprayed with cooking spray.

Then, heat up more olive oil in the pan and sauté the onions and bell pepper for 5 minutes.

Next, stir in mushrooms and cover the pan with a lid. Let cook for about 5 minutes or until the veggies begin to soften.

Remove lid and add garlic and butter, keep over heat until the butter has melted. Then, remove from heat and stir in the cherry tomatoes.

Place sautéed veggie mixture over wilted spinach in casserole dish.

Then, spread cheese on top and pop in the oven!

Bake at 350 degrees for about 20 minutes or until cheese has melted.

Let cool for about 10 minutes before serving the spinach and sautéed veggie casserole.


Ingredients
- 4 tablespoon of Extra Virgin Olive Oil divided
- 20 ounces of Fresh Baby Spinach
- 1 Red Bell Pepper chopped
- 1 Orange Bell Pepper chopped
- 1 Medium Onion chopped
- 10 ounces of Sliced Mushrooms
- 2 tablespoon Butter
- 3 Garlic Cloves finely chopped
- 15 Small Cherry Tomatoes cut in half
- 1 Cup Cheddar Cheese shredded
Instructions
- Preheat Oven to 350 Degrees
- Heat 2 tablespoon of olive oil over medium high heat in a large skillet.
- Add spinach and sauté for approximately 6 minutes, or until spinach is wilted.
- Place wilted spinach in a 2 quart dish.
- Heat Olive Oil in Skillet over medium heat. Add Bell Peppers and Onions to skillet and sauté for 5 minutes
- Next, add mushrooms, stir and cover skillet with lid for approximately 5 minutes or until veggies begin to soften.
- Remove cover from skillet and add minced garlic and 2 tablespoon of Butter, keep over medium heat until butter is melted.
- Remove from heat and add cherry tomatoes.
- Place sauteed veggies & butter mixture over wilted spinach in baking dish.
- Spread cheese evenly over the top.
- Bake at 350 degrees on center rack of oven for approximately 20 minutes or until cheese has melted.
Video
Nutrition
So Tell Me...
Do you get creative with things in your refrigerator? Do you have a favorite side dish? What do you do when you have fresh fruit and veggies on the brink of going bad?
Thank you so much for stopping by! As always, I would love to hear your thoughts in the comments section below. Have a Great Week!
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Note: This post was updated on 8/30/2019. It was originally published on 11/27/2017.

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That sounds really good. I just found out that I am hosting Christmas dinner at my house this year, so I need recipes like this for my guests. Yum.
YUM!! I am always on the look out for new recipes especially for veggies. Plus we love our spinach just like Popeye.
Simple and delicious! My favorite kind of veggie meal
Yum, love the spinach in the savory dishes! Great way to use it up 🙂
Angela - this is such a scrumptious vegetarian meal option!! Yummy!
This is such a great dish to enjoy right after all that heavy eating from the holiday and weekend. Love the spinach in this one.
Always rely on casseroles to get in all my veggies!
This looks really good! I am always looking for creative ways to incorporate greens in recipes, so this is perfect! And to answer your question, no 🙁 i am so not creative in the kitchen. i like to depend on well crafted recipes for successful cooking!
This is my kind of casserole!! I think I may have to give this a try for my vegetarian daughter- I'll have to hide the mushrooms. 🙂 Thanks for sharing!
That is a great way to prepare vegetables. I would make this not just with leftovers but intentionally as a great veggie dish.
Sounds absolutely delicious and a great way to pack in all the veggies in one meal! Can't wait to try!
I love vegetables, and I could eat mushrooms everyday! I'm going to make this! Thanks for sharing it!
This looks delicious! We haven't gotten creative because we traveled so no leftovers for us. So sad.
I'm down with any big dishes filled with vegetables. Looks great!
What a wonderful meatless recipe! It looks fairly easy, plus it has yummy, good for you GARLIC!
This one's packed with all the right flavors! I love casseroles because they're easy to put together. This would be nice eaten on its own or as a side.
This looks good. Sometimes you just don't want a meaty meal. I would love to try this!
Mmm this looks so tasty and easy to make!! A dish from my dreams 🙂
This looks like a great way to use up a bunch of leftover veggies. I always have a bunch of random things here and there but don't always have a way to use them.
i need to think about this recipe towards the end of the week when im trying to use whatever i can find 🙂
I could make an entire meal out of this casserole. I love to add spinach every chance I get!
This is such an awesome recipe for vegans like me. I am going to definitely this recipe out this weekend... 🙂
This looks so good! I love getting in my veggies like this!
Spinach and veggies all together sounds so delicious. I love spinach and this casserole looks so easy and perfect to have!
This looks too good! I love Spinach, and we try to do at least one meatless dinner a week so this would be perfect to do for my meatless monday.
What a great way to get veggies on the table! My family would love this! I don't cook this type of thing often enough.
What a great side dish! I love that it would go with literally EVERYTHING. Thanks for sharing!
Spinach and vegetables, perfect healthy combo. if you can get whole family to eat it especially kids, it is a win.
This looks like such a great meal! I love how fresh and easy it is.
This looks like it would be so flavorful. I love that it is a casserole that isn't just potatoes and canned soup!
Well I'm drooling right now! What a great and yummy way to get so many veggies in your diet!
Wow this looks and sounds delicious I will have to try this with my family! I know it will be a big hit!
There is nothing like the combination of spinach and cheese. I could eat it every day and it's a staple in my veggie lasagna. Can't wait to give this sautéed veggie casserole a try.
This is definitely something that I'd make for the family! Veggies is always a good idea when it comes to food! Thanks for the recipe!
This looks awesome, and so easy to make! Exactly the kind of food I'm craving these days! Cheddar cheese makes everything worth it!
This looks absolutely delicious! I just did something similar with frozen veggies to clean out the freezer.
This looks so delicious! I will definitely try this awesome recipe
I love all the veggies. I was sure I had already commented 🙂
This looks absolutely delicious! I am a big lover of veggies and it sounds so easy. Definitely saving!
My gf always says I don't eat enough veggies might need to give this one a shot lol!
This looks like it would be an amazing casserole! I am going to have to try this ASAP!
We eat meat free most of the week, so this looks like a perfect dish for one of our weeknight meals! Yum!
This is such a great way to use up leftovers and I’m so glad your family enjoyed it. Plus it sounds super healthy too!
That looks delicious healthy and savory
This sounds absolutely fantastic! I have been wanting to add more vegetarian options to our menu, and I think this is one even the husband would agree on.
I love roasted veggies! My mouth is already watering looking at this recipe! I can't wait to try it!
Now this looks and sounds delicious. I have been trying to eat healthier and I absolutely love all the veggies in this recipe. I can't wait to try.
This looks delicious girl!!
That looks amazing and scrumptious too. This would be great to make so that the kids can eat the veggies.
Starting to get into using up what I have in my refrigerator. This sounds like a really great recipe!
Oh my! This casserole looks so very delish! I should try this for my family.
Yum, I love a good recipe where we can add more fresh veggies in our home! We've been going to a lot of farmer's markets lately so this is perfect for us!
Baking is always a good thing when veggies are going bad or fruits. And these look like some amazing recipes to try out.
looks amazing must try this one
This was very simple to make and really good. I used Gouda and Monterey Jack cheese. Hubby loved it too!