Slice the French bread into 1/4-inch slices. Place on a baking sheet and brush each slice with melted butter. Lightly sprinkle with cracked pepper pressing to adhere.
Place the bread slices under the broiler for approximately 2-3 minutes until lightly toasted. Turn each slice over and toast the other side for 1-2 minutes until lightly toasted. Remove from oven and place on a rack to cool.
In a small bowl, combine the cream cheese, sour cream, garlic, Parmesan cheese, cayenne pepper and salt; mix well. Gently stir in crab.
Lightly butter a small baking dish. Fill with the crab mixture.
Preheat oven to 350 degrees. Bake for approximately 20 minutes until the top is bubbly and starting to turn brown.
Serve warm with toasted French bread.
Cook's Note: Steps 3 and 4 can be done ahead of time, covered and refrigerated until ready to bake.