Step 1

Preheat oven to 400 degrees F (200 degrees C). Rinse the fillets and pat dry with paper towels.

Step 2

Combine crab meat, green pepper, mustard powder, Worcestershire sauce, salt, white pepper and the crushed saltines. Combine the egg white and 1 tablespoon mayonnaise. Stir this into the crab meat mixture.

Step 3

Brush the flounder fillets with melted butter. Place in a lightly greased, shallow baking dish. Spoon the crab mixture over the fillets and drizzle with any remaining butter.

Step 4

Bake the fillets at 400 degrees for 15 minutes.

Step 5

While the fish is baking, lightly beat the egg yolk in a small bowl. Stir in 5 tablespoons of mayonnaise. Remove fish from oven and spread this mixture over the stuffing; sprinkle with paprika and parsley.

Step 6

Increase oven temperature to 450 degrees and bake until golden and bubbly, about 6 minutes.