Step 1

Cook the pasta in salted water according to package instructions.

Step 2

While the pasta is cooking, heat the olive oil in a large pan over medium-high heat.

Step 3

Add the onions to the pan and cook for 3-4 minutes, or until they've started to soften.

Step 4

Add the broccoli, carrots, squash, and mushrooms to the pan. Season the vegetables with salt and pepper to taste.

Step 5

Add 2 tablespoons of water to the pan. Cook for 5-7 minutes or until vegetables are tender and starting to brown.

Step 6

Stir in the garlic and cook for 30 seconds more.

Step 7

Add the cooked pasta and marinara sauce in the pan; toss to coat.

Step 8

Sprinkle with parmesan cheese and serve. Top with chopped parsley if desired.