Comforting Tuna Casserole

I got this recipe from Oxygen Magazine…It is simple and healthy.  If you family doesn't like tuna just switch it with some cooked chicken cut up in pieces.

1 small sweet potato
6 tbsp Parmesan cheese
1 tbsp mayonnaise
1 tsp Dijon mustard
1 tsp garlic powder
1 tsp ground black pepper
1 cup low fat milk
1 tsp olive oil
1/2 onion
1 cup frozen peas
2 cups cooked brown rice
1 - 7oz can tuna, drained and flaked

1. Preheat oven to 400F.
2. Peel sweet potato, heat in microwave and mash well with a fork. (I try 5 min at first and go from there)  Set aside.
3. In a large mixing bowl, mix together cheese, mayo, mustard, garlic powder, pepper and milk.  Add mashed potato and blend well to get a creamy orange sauce.
4. Heat oil in a small skillet.  Saute onion until soft, about 2 minutes.  Add peas.  Add brown rice to reheat.  Then stir in sweet potato.  Add tuna and mix to combine.
5. Place everything in an 8x8 inch baking dish and bake for 20 minutes.  Serve on a bed of steamed spinach.