If you find that the fresh taste of garden-fresh-picked tomatoes is a bit too tart for your preference, add a little bit of sugar at a time to take this to a better flavor for you....this is why many Italian cooks often add shredded carrots to their sauces . . . to sweeten and balance some of the tartness of the tomatoes.
AGAIN: this is totally up to you and your taste preferences.
My tomatoes needed about a teaspoon of sugar added this year; but I like the tartness and that's just me.
Serve with delicious garlic bread and a nice mixed greens salad!