In large sauce pan, brown hamburger, & onion, add salt, & pepper to taste. (drain).
Add tomatoes, tomato paste, garlic powder, red pepper flakes.
In another pot boil enough water for pasta. cook 7 to 9 minutes. add pasta to hamburger, & tomato sauce, add the pasta water. (if sauce is to thick add more pasta water). cover & simmer, add parmesan cheese on top. enjoy!