Brown and drain ground round. Add onion, chilies, corn, taco seasoning mix, and taco sauce; stir to combine. Cook over medium heat until onion is tender (about 5 minutes); stir frequently. Remove from heat and set aside to cool slightly.
Coat a 2-quart baking dish with cooking spray. Spread refried beans in bottom of baking dish. Spoon half of beef mixture evenly over beans. Top with 1 cup broken chips. Sprinkle with half of each cheese. Top evenly with remaining beef mixture then sprinkle with remaining cheeses. Cover tightly with plastic wrap and refrigerate at least 6 hours, or overnight.
To bake, preheat oven to 350°F. Remove plastic wrap. Spray a piece of foil with cooking spray and place over baking dish, sprayed side down. Bake for 1 hour, or until cheese is melted and casserole is heated through. Remove from oven and sprinkle evenly with remaining 1 cup broken chips.
Portion into 8 equal servings and, if desired, top each serving with shredded lettuce, diced tomato, and fat-free sour cream.
Calories: 398 calories, Carbohydrates: 42 g, Protein: 26 g, Fat: 14 g, Saturated Fat: 5 g, Sodium: 1,061 mg*, Fiber: 3 g
Exchanges per serving: 3 starch, 2 lean meat, 1 fat. Carbohydrate choices: 3.
*This recipe may not be suitable for people who need to lower their sodium intake.
This recipe was developed by Tami Ross, a Diabetes Nutrition Specialist and Certified Diabetes Educator in Lexington, Kentucky.