Hamburger and Mashed Potato Casserole (Hilda)

1 lb         lean gr. beef or chicken                         1/2 c          salsa
1 c          rolled oats                                             1/4 tsp       thyme
1/2         small onion chopped fine                        1/8 tsp       sugar
2 tbsp    chopped green pepper                            1/8 tsp       celery salt
1/2 c      canned tomatoes                                     1 tsp          salt

Mix all ingredients and put into a quiche or pie plate.  Pat and shape like a shell.  Fill centre with mashed  potatoes   and bake for 30 - 40 min at 350 degrees.  Top with grated cheddar cheese at the end if desired.