Sweet Potato Shepherds Pie

I wish I could think of a cool name for this recipe. I made this up last night after stewing about it for awhile. I can't give exact measurements because I didn't really measure anything.

~1 lb leftover roast beef (think it might be good with chunks of ham but I haven't tried it)
2 med - large sweet potatos
3/4 can mushroom soup
handful mushrooms

I had leftover roast beef in the freezer so I thawed it almost all the way and then sawed away at it until it was cut into bite-size chunks. Then I dumped it into my glass 4 cup measuring cup with 3/4 can of cream of mushroom soup watered down to gravy consistency. I heated all that up in the microwave until bubbling.
Meanwhile, I had peeled and diced the sweet potatoes and boiled them in a pot until they were mashable. I mashed them with milk, margarine, salt, pepper and cajun seasoning.
Then I sauted some mushrooms ... I think you could do other veggies but I'm not sure what.
Then I layered the meat/soup mixture on the bottom of a casserole dish, then the mushrooms then the mashed sweet potatoes.
I put it uncovered in a preheated 350 degree oven for about 15 minutes until bubbly and steaming.

We had enough for a generous helping and a half at dinner for 2 people and enough for a small size portion for lunch today.

Enjoy!