Halve eggs lengthwise. Remove yolks and mash; stir in mayonnaise, mustard, and 1/8 teaspoon salt. Stuff egg whites with yolk mixture. Arrange egg halves in a 10x6x2 inch baking dish. Cook onion and green pepper in 2 tbsp. Butter till tender. Stir in flour, sugar, 1/2 tsp. Salt, and dash of pepper. Add undrained tomatoes and bay leaf. Cook and stir till bubbly. Cook and stir 2 minutes more. Remove bay leaf; pour over eggs. Toss together crumbs and 1 tbsp. Melted butter; sprinkle atop. Bake in a 350F oven about 25 minutes. Let stand 5 to 10 minutes. Serves 4,