Preheat oven to 350°.
Coat a large nonstick skillet with cooking spray, and place over medium-high heat. Add bell pepper, celery, and onions; sauté 5 minutes or until vegetables are tender. Remove from heat.
Stir in mayonnaise and next 8 ingredients. Gently stir in 3/4 cup breadcrumbs and crabmeat.
Spoon crabmeat mixture evenly into 6 gratin dishes coated with cooking spray; top each with 2 tablespoons breadcrumbs. Coat breadcrumbs with cooking spray. Bake at 350° for 20 minutes or until bubbly and lightly browned.
NOTE: If you don't have gratin dishes, use 6-ounce ramekins or custard cups. Bake at 350° for 28 minutes or until bubbly and lightly browned.