Pesto Shrimp Pasta

2 cups uncooked pasta (macaroni or penne) 2 tablespoons olive oil 1 onion , sliced 1 bell pepper , sliced 2 garlic cloves , sliced 1 cup mushroom , sliced 2[...]

1 lb spinach pasta (you can really use any of your favorite pastas, but the spinach is best for this) 2 (15 ounce) cans Italian tomatoes 1 small onion , diced[...]