Meanwhile, begin making the sauce. In a medium saucepan boil the tomatoes. Make sure they are covered with water. This will take around 10 minutes or until you notice the skin has torn apart.
Once the tomatoes are ready, save ½ cup of the water used to boil the tomatoes and discard the rest.
Peel the tomatoes and dice them.
Heat a large saucepan. Once warm add in the oil and wait until it is hot.
Add in the onion and garlic. Cook for 3 - 4 minutes or until they are slightly brown. Stir frequently so they cook evenly.
Add in the tomatoes, pepper, tomato purée, herbs, basil sprig, and ½ cup of reserved boiled water.
Let it simmer on low heat for 5 - 7 minutes until it thickens. Remove the basil sprig.
Remove from heat and set aside.
Once the beef is ready combine it with the sauce.
Take some sauce and spread it on the bottom of the baking dish. Spread evenly throughout.