Boil pasta to al dente according to package directions along with 1 tablespoon salt
Drain pasta and set aside
Heat oil in a skillet
Add diced sweet onion to the skillet and sauté for 1-2 minutes
Add minced garlic cloves to the skillet and sauté for 1-2 minutes
Add diced tomatoes to the skillet and sauté for 2-3 minutes
Add broccoli florets, bell pepper, mushroom to the skillet and sauté for 2-3 minutes
Add olives, tomato sauce, oregano leaves, basil leaves, Italian seasoning, chili flakes and salt to the skillet and sauté for 1-2 minutes
Serve with garlic bread