Creamy Veggie Pasta

A friend that went to an upscale culinary school taught me to make this and it's amazing, and fast.

1 zucchini, 1 yellow squash, and several mushrooms, chopped
1/2 onion, chopped
2-3 Tbls butter
garlic, minced (she used a ton, I used 2 tsp of pre-minced garlic)
1 1/2 c. Spaghetti sauce
1/4 c. heavy cream
Noodles, 1 lb. (or around 4-5 servings)
Salt
Oregano (she used fresh...I used Italian Seasoning)
Parmesan cheese, freshly grated, to taste

Bring water to boil and add pasta. Cook to al-dente.
In large skillet heat butter and saute onion over med. heat. Add garlic and cook another minute. Add chopped vegetables and cook another 5-7 minutes. Stir in seasonings. Add tomato sauce and stir until bubbly then add cream while stirring.
Add drained pasta and top with parmesan cheese.