
Preheat oven to 400F.
Chop shrimps or process in a food chopper into small pieces. Don't process into a paste. Mix shrimp with mayonnaise, melted butter, grated garlic, scallions and a generous amount of black pepper.
Slice ciabatta or baguette in half horizontally, or cut baguette into thin slices. Each slice/half should not be thicker than 1 inch.
Spread the shrimp mixture on the cut side of the bread. Place into the oven and bake for 15-18 minutes or until the top is golden and bread is crispy.
Remove bread from the oven. Sprinkle fresh basil and serve immediately.