I am not the person who mentioned homemade marinara but it is easy to make. I never use a recipe but here is what I do...
1 large can of whole tomatoes (San Marzano is the best) *I use fresh tomatoes in the summer - just parboil a few minutes to take the skin off, chop and cook till fine
lots of chopped garlic - maybe 6 cloves
salt, pepper, crushed red pepper (optional for a bit of heat)
fresh basil - maybe 10 - 15 leaves, chopped or torn (I roll the leaves and cut into strips)
extra virgin olive oil, I like alot, maybe a 1/4 cup
***
In a sauce pan, heat oil and saute garlic for a few minutes (do not burn). Crush tomatoes with your hand and add to garlic, along with their juice add salt, pepper and crushed red pepper to taste. Simmer for about 15 - 30 minutes. At this point, I take a potato masher and mash the tomatoes since I do not like super chunky sauce. Add basil and simmer for another 5 minutes.