Maryland Crab without cookies peanut capers

4 tablespoons unsalted butter (1/2 stick) 1 small yellow onion , minced 2 tablespoons flour 1/8 teaspoon ground red pepper 1/8 teaspoon white pepper 1/8[...]

3 slices bacon , cut into 1/2 inch pieces 2 1/2 lbs onions , chopped 1 lb carrot , peeled and chopped 1 lb celery , chopped 3 medium green bell peppers ,[...]