Avocado Pizza

Ingredients

• 1 avocado, peeled, sliced
• 2 pounds tomatoes
• 6 tablespoons canned tomato sauce
• 12 ounces low-fat mozzarella cheese, grated
• 2 tablespoons grated Parmesan cheese
• 1/2 cup chopped fresh basil
• 1/2 cup diced green bell peppers
• 1/2 cup sliced mushrooms
• 2 (10 ounce) packages frozen pizza dough
• Salt, to taste
• Black pepper, to taste