Scalloped Celery

This is the most unique use of celery I've ever seen. My grandfather really liked this recipe and requested it for all the holidays. Amy told me I should post this recipe. :-)

4 cups celery, thinly sliced

6 Tbsp butter, divided

3 Tbsp flour

1/2 tsp salt

1 Cup milk

1 can mushrooms

2 Tbsp green peppers, finely chopped

2 Tbsp pimientos

1 cup sharp cheddar, grated

1 cup soft bread crumbs

Saute celery in 4 Tbsp butter until tender. Remove with a slotted spoon and set aside. Stir flour and salt in skillet. Add milk and bring to a boil. Cook 2 minutes. Add remaining ingredients except reserved butter and bread crumbs. Stir until cheese melts. Add celery. Pour into 1 quart casserole. Toss bread crumbs with remaining butter. Sprinkle over casserole. Bake 20-25 minutes at 350 degrees.