which i have [somewhat] perfected. :)
ingredients (for 2-3 servings of pasta):
1 14oz can of diced tomatoes
handful of baby tomatoes or one regular tomato (diced)
handful of fresh basil, chopped
salt to taste
add can of tomatoes to saute pan at medium-high heat. add fresh tomatoes, sprinkle oregano in saute pan- in circular motion once around the pan. add basil and salt to taste.
you can also add things like mushrooms or mozzarella cheese for a little variety. we have this sauce with pasta often :)