1 (12 oz) package penne rigate
1 lb sliced red, green and yellow bell peppers
2 Tbsp olive oil
1 tsp Italian seasoning
1 tsp dried parsley
1 medium zucchini, sliced
1 yellow summer squash, sliced
6 oz mushrooms, sliced
1 clove garlic, minced
2 tomatoes, cored, peeled and chopped coarsely
Salt and pepper, to taste