Preheat oven to 400° F. Spray a 13 x 9 baking dish with nonstick cooking spray.
Combine 1/4 cup cheese and next 6 ingredients (through chilies) in a large bowl, stirring just until moist. Pour mixture into prepared baking dish.
Bake at 400° F for 15 minutes or until set. Pierce entire surface liberally with a fork; pour enchilada sauce over top. Top with ground beef; sprinkle with remaining 2 cups of cheese. Bake at 400° F for 15 minutes or until cheese melts. Remove from oven; let stand 5 minutes. Top casserole with green onions and cut into serving pieces.
Total Fat 42g
Saturated Fat 18g
Total Carbohydrate 192g
Dietary Fiber 3g