Directions

1. Preheat convection oven to 375 degrees or conventional oven to 350 degrees. Coat parchment-lined baking sheet with cooking spray. Roll dough into 3/4-inch balls; place 1 1/2 inches apart on baking sheet. Cover with plastic wrap sprayed lightly with cooking spray. Let stand in a warm place until dough doubles in bulk, 20 minutes.
2. Brush egg wash over dough; sprinkle with poppy seeds. Bake until golden brown, 8 to 10 minutes, rotating pan halfway through. Cool buns on rack.
3. In bowl, mix ground beef, salt, and pepper. Shape 1/4 ounce at a time into 1 1/2-inch patties. Broil or grill 1 minute per side.
4. At serving time, preheat oven to 350 degrees. Slice buns in half. Layer ketchup, tomato, and lettuce on each bottom half.
5. Place burgers on baking sheet; top each with a slice of cheese. Bake until cheese melts, 2 to 3 minutes Place in buns; serve.