6 slices firm white sandwich bread |
3 tablespoons unsalted butter |
1/8 teaspoon cayenne |
1/4 teaspoon salt |
6 ounces jumbo lump crab meat |
1 tablespoon minced shallot |
1 tablespoon chopped fresh dill leaves |
2 tablespoons mayonnaise |
2 tablespoons sour cream |
2 teaspoons fresh lemon juice |
garnish: 24 fresh dill sprigs |