Ingredients:

10 ounces skinless salmon fillet, cut into 1-inch pieces
3 tablespoons plus 1/2 cup purchased tartar sauce
2 tablespoons chopped fresh dill
1/4 teaspoon salt
1/4 teaspoon ground black pepper
1 teaspoon grated lemon peel
2 sesame-seed rolls, split
Red onion slices
4 Bibb lettuce leaves

Methods:

Place salmon fillets, 3 tablespoons tartar sauce, 1 tablespoon dill, salt, and pepper in processor. Blend using on/off turns until coarsely ground. Form into two 1/2-inch-thick patties. (Can be made 6 hours ahead. Cover and refrigerate.)

Prepare barbecue (medium-high heat). Whisk 1/2 cup tartar sauce, 1 tablespoon dill, and lemon peel in medium bowl to blend. Grill rolls until toasted. Transfer to 2 plates and spread bottom halves generously with sauce. Grill patties until fish is cooked through, about 2 minutes per side. Place burgers atop sauce on rolls. Top each with onion slices, 2 lettuce leaves, and top half of roll. Serve, passing remaining sauce separately.