Ingredients

• 3 tablespoons unsalted butter
• 4 slices crusty bread
• 1 clove garlic , peeled
• 500 g cold water shrimps , drained and coarsely chopped
• 1/4 red onion , finely chopped
• 1 stalk celery , finely chopped
• 1/3 cup mayonnaise
• 1/3 cup sour cream
• 2 tablespoons finely chopped fresh dill
• 1 tablespoon lemon juice
• salt and pepper
• 8 leaves Boston lettuce (optional)
• 4 tablespoons trout or salmon caviar