Simple Tomato and Basil Sauce

This is a simple and very nice and fresh-tasting tomato sauce that goes great with pasta, gnocchi, and on bread as a pseudo-bruschetta. This makes about 2-3 servings worth
Prepare:
-Seed and dice 3 large tomatoes
-Chop 1 large onion and 4-5 cloves garlic
-Chop up a bunch of basil, at least 1/2 cup worthCook:
-In a small pot, on medium heat, cook tomatoes and 1/4 cup of basil in olive oil-At the same time, in another pot/pan, lightly fry onion and garlic, in olive oil, until fragrant and tender-When tomatoes get soft, add the onion/garlic mixture, turn heat down to low, add salt and cracked black pepper, and about a tsp of brown sugar to offset the acidity; simmer for ~2 hours (you read that correctly), stirring every 10-20 minutes to make sure nothing gets burnt. When you're almost ready to use it, dump the rest of the basil in itTips:
-You could add one or two hot peppers to the tomato if you wanted a sauce with more of a kick
-Adding marjoram, oregano, parsley, or other Italian herbs and spices would be welcome, of course, I just wanted to keep mine simple