Pierogy Quiche - Mrs. T's Pierogies

Ingredients

• 1 box Loaded Baked Potato or your favorite variety of Mrs. T's® Pierogies
• 1 tablespoon butter or margarine
• 1 small red bell pepper, thinly sliced
• 1 cup mushrooms, sliced
• 3 cups baby spinach
• 2 scallions, sliced
• 1 ½ cups milk
• 3 large eggs
• ¼ teaspoon salt
• ¼ teaspoon ground black pepper
• 1 cup shredded Asiago cheese
• Nonstick cooking spray