Ingredients

1 tablespoon vegetable oil
1   small yellow onion, chopped
1   green bell pepper, chopped
1/2   stick butter
3 tablespoon all-purpose flour
1 1/2 cup half-and-half
1 teaspoon ketchup
1 teaspoon dijon mustard
2 cup homemade or store bought bread crumbs
1 lb fresh crabmeat
1/2   lemon, juiced
salt and freshly ground pepper to taste

Directions

Add 1 tablespoon oil into large saucepan. Saute the onion and green pepper until tender. 

Over low heat in a medium saucepan, add butter and flour. Stir together. Slowly add half and half while whisking, about 2 minutes. Add ketchup, mustard and bread crumbs. Mix to combine. Allow to simmer for a few minutes. Add crabmeat and lemon juice. Season with salt and pepper, to taste.