Chicken Enchilada Casserole

I made a casserole like this earlier, but didn't know the calorie count per serving. I tried my very best to count how much a serving would be and made this a lot healthier!

Chicken Enchilada Casserole
Servings 8
Per Serving: 312 calories, 8.4g fat

Ingredients:
15 oz chicken (500 cal, 10g fat)
2oz cheddar cheese (220 cal, 18g fat)
1 whole red bell pepper (40 cal, 0 g fat)
1 can sliced black olives (175 cal,17.5g fat)
1 can Rosarita spicy refried beans ( 360 cal, 7.5g fat)
1 can Las Palmas salsa verde (225 cal, 13.5 g fat)
1 1/2c Albertsons Fat Free Shredded mozzarella ( 240 cal, 0g fat)
5 Trader Joe's whole wheat tortillas (700 cal, 1g fat)
1/4 c corn (33 cal, 0 g fat)

Directions
1) Preheat oven to 350 degrees
2) Place 1 tortilla and a 1/2 on the bottom of the casserole dish. Coat the tortillas with the entire can of beans in an even layer. Layer next 1/3 salsa verde, bell pepper, 1/2 chicken, and 1/2 cheese.
3) Add another layer of tortillas, add 1/3 salsa verde, black olives, remaining chicken and cheese.
4) Last layer with remaining tortillas and coat with the last of the salsa verde. Decorate the top with 1/2c mozzarella, a few bell peppers and the corn.
5) Bake in the oven for 40 minutes