Red Lobster Crab Stuffed Mushrooms

1 pound mushrooms, approx 35-40
1/4 c celery, finely chopped
2 tbsp onion, finely chopped
2 tbsp red bell pepper, finely chopped
1/2 pound crab claw meat
2 c oyster crackers crushed
1/2 c cheddar cheese, shredded
1/4 tsp garlic powder
1/2 tsp Old Bay seasoning
1/4 tsp black pepper, ground
1/4 tsp salt
1 egg
1/2 c water
6 white cheddar cheese slices

Preheat oven to 400° Saute celery, onion and pepper in butter for 2 min, transfer to a plat and cool in the fridge. Wash mushrooms and remove stems. Set caps to the side and finely chop half of the stems. Discard the other half or use elsewhere. Combine the sauteed vegetables, chopped mushroom stems and all other ingredients (except cheese slices) and mix well. Place mushroom caps in individual buttered casseroles or baking dishes (about 6 caps each). Spoon 2 tsp of stuffing into each mushroom. Cover with sliced cheese. Bake in oven for 12-15 min, until cheese is lightly browned