INGREDIENTS
1 8 ounce package
penne pasta
2 tbsp
olive oil
1/2 cup
chopped onion
1 clove
garlic, minced
3 cups
chopped tomatoes
1 cup
sliced fresh mushrooms
2 cups
spinach leaves, packed
salt and pepper
1 pinch
red pepper flakes
8 oz
feta cheese, crumbled