01 - Turn on oven broiler or preheat oven to 425°F for optimal toasting temperature.
02 - Combine softened butter, minced garlic, lemon juice, lemon zest, parsley, chives, salt, black pepper, and cayenne in a small bowl. Mix until completely smooth and incorporated.
03 - Gently fold crab meat into the garlic butter mixture, being careful to maintain the lump texture of the crab.
04 - Arrange bread slices on a baking sheet. Broil or bake for 2–3 minutes per side until golden brown and crisp throughout.
05 - Spoon crab mixture generously onto each toasted slice. Return to broiler for 1–2 minutes just until heated through, taking care not to overcook the seafood.
06 - Remove from oven, sprinkle with additional fresh herbs, and serve immediately with lemon wedges on the side.