Southwestern Quiche

INGREDIENTS

• 1 (15-ounce) package refrigerated piecrusts
• 2 cups sliced fresh mushrooms
• 2 teaspoons vegetable oil
• 1/2 cup (2 ounces) shredded mozzarella cheese
• 1/2 cup (2 ounces) shredded Swiss cheese
• 1/2 cup (2 ounces) shredded Cheddar cheese
• 5 large eggs, lightly beaten
• 1/2 cup half-and-half
• 1/2 cup picante sauce or Salsa Picante
• 1 tablespoon all-purpose flour
• 1/2 small green bell pepper, chopped
• 1/4 cup ripe olives, chopped