Sausage and Pepperoni Pizza Pasta

Ingredients (13)

• 4 cups uncooked penne pasta
• 3 Italian sausage links, cut into 1/2-inch slices
• 1 cup sliced fresh mushrooms
• 1 medium green pepper, chopped
• 1 medium onion, chopped
• 1 package (3-1/2 ounces) sliced pepperoni
• 3-1/2 cups water
• 2 cans (6 ounces each) tomato paste
• 2 envelopes thick and zesty spaghetti sauce mix
• 1 can (2-1/4 ounces) sliced ripe olives, drained
• 1/4 cup olive oil
• 1/2 teaspoon garlic salt
• 1 cup shredded part-skim mozzarella cheese