2 slices white sandwich bread, (about 1 ounce each)
1 pound (93 percent lean) ground turkey
2 ounces cheddar cheese, coarsely grated (about 1/2 cup)
1/2 small onion, coarsely grated
Coarse salt and freshly ground pepper
1 teaspoon olive oil
12 party-size rolls
Lettuce, sliced tomatoes, ketchup, and mustard, for serving (optional)
In a food processor, pulse bread until fine crumbs form. Transfer to a medium bowl; add turkey, cheese, and onion. Season with salt and pepper, and mix gently just until combined. Form twelve 2-inch patties (about 3 tablespoons each).
In a large nonstick skillet, heat oil over medium heat. Cook patties until browned and cooked through, about 5 minutes per side. Serve on rolls with lettuce, tomatoes, ketchup, and mustard, if desired.