Tostada Pizzas

Ingredients

• 20 tostadas (5-inch shells)
• 2 lbs lean ground beef
• 2 cups onions, chopped
• 2 cups green peppers, chopped
• 1 teaspoon garlic powder
• 1 teaspoon salt
• 14 teaspoon black pepper
• 1 teaspoon basil
• 1 12 teaspoons oregano
• 12 teaspoon cumin
• 2 tablespoons flour
• 1 (12 ounce) light beer
• 1 (15 ounce) can tomato sauce
• 1 teaspoon sugar
• 12 cup water
• 14 cup green chili, diced
• 12 cup black olives, sliced
• 1 12 cups monterey jack cheese, shredded
• 1 12 cups cheddar cheese, shredded
• 14 cup parmesan cheese, grated
• 14 cup parsley, chopped