Chiles Rellenos Casserole

Ingredients

• 2 teaspoons canola oil
• 1/2 pound ground chicken
• 1 cup chopped onion
• 1 3/4 teaspoons ground cumin
• 1 1/2 teaspoons dried oregano
• 1/2 teaspoon garlic powder
• 1/4 teaspoon salt
• 1/4 teaspoon freshly ground black pepper
• 1 (16-ounce) can vegetarian refried beans
• 1 (4-ounce) cans whole green chiles, drained and cut lengthwise into quarters
• Cooking spray
• 1 cup (4 ounces) shredded colby-Monterey Jack cheese
• 1 cup frozen whole kernel corn, thawed and drained
• 1/3 cup all-purpose flour
• 1/4 teaspoon salt
• 1 1/3 cups fat-free milk
• 1/8 teaspoon hot sauce
• 2 eggs, lightly beaten
• 2 egg whites