1/4 large onion, chopped
1 (14 ounce) can Italian diced tomatoes
1 (15 ounce) can tomato sauce
1 pinch salt
1 heaping teaspoon Italian herbs
1/4 teaspoon garlic powder
1/4 teaspoon onion powder
marjoram, to taste
few tablespoons olive oil, to taste
Saute onions. Add all other ingredients, including additional olive oil if desired, to large sauce pan and cook until warm.
Source of recipe: I made this up just after I got married.