The Bod's Sweet Potato Souffle

Got this recipe from a friend whose mom is known as The Bod. You know it must be good.

2 C mashed sweet potato (about 4 med. sweet potatos)
½ C sugar
2 eggs, beaten
1/3 C butter
½ tsp salt
½ C milk
splash vanilla

1. Steam sweet potatos (I have also boiled them in the past but they turn out runnier and not as nice)
2. Mix
3. Put in casserole dish
4. Add topping

TOPPING:
1 C brown sugar
1/3 C flour
1 C coconut
1 C nuts

5. Bake at 350 for 25 minutes