Melt 4 tbs butter in a large skillet, add your celery, onion, mushroom & andouille sausage cook over med high heat for 8 minutes. Add 2 tbs flour and stir continuosly for 2 minutes, add your cajun seasoning, sherry wine & grated parmesan stir well. Add 2 cups of half & half and cook over medium heat for 5 minutes until sauce thickens. Remove pan from heat and stir in your jumbo lump crab.
Add your crab mixture into 4 greased oven safe bowls or "Ramekins" dividing evenly. top each mixture with 3 heaping spoonfull's of your cheddar garlic biscuit mix, place in a 350* oven and bake for 25-30 minutes until crust is slightly browned.
Remove from the oven, plate them up and ENJOY!!!!!!