This is a sauce that is primarily based on baking the ingredients rather than simmering them on the stove for hours. It is very easy.  If you don't have a food mill, you can crush the tomatoes with a potato masher, take out as much of the skins as you like (I don't mind them so much, personally).

Tomato Sauce

20 Roma tomatoes, halved and seeded
1/4 cup olive oil
1/2 teaspoon kosher salt
1 teaspoon pepper
1 cup finely diced onion
2 teaspoons minced garlic
1 tablespoon finely chopped oregano leaves
1 tablespoon finely chopped thyme leaves
1 cup white wine

Preheat oven to 325 degrees F.
In 2 (13 by 9-inch) pans place

tomato halves cut side up. Sprinkle with oil, salt and pepper, onion, garlic, and herbs. Bake tomatoes for 2 hours. Check the tomatoes after 1 hour and turn down the heat if they seem to be cooking too quickly. Then turn the oven to 400 degrees and bake another 30 minutes. Remove from the oven and process tomatoes through a food mill on medium dye setting over a small saucepan. Discard skins. Add white wine, bring to a boil, reduce heat to low and cook for 5 minutes.