- 3 tablespoons bulgur
- 1/4 cup boiling water
- 2 teaspoons extra-virgin olive oil
- 2 cups sliced onions
- 1 teaspoon sugar
- 2 tablespoons water
- 1 teaspoon balsamic vinegar
- 1/4 teaspoon salt, divided
- 8 ounces 92%-lean ground beef
- 1 tablespoon tomato paste (see Tips for Two)
- 2 tablespoons chopped fresh parsley
- 1/4 teaspoon freshly ground pepper
- 2 whole-wheat hamburger buns, split and toasted
- Lettuce
- Combine bulgur and 1/4 cup boiling water in a small bowl; let stand until most of the water is absorbed, 20 to 30 minutes.
- Meanwhile, heat oil in a nonstick skillet over medium-low heat. Add onions and sugar; cook, stirring occasionally, until the onions are very tender and golden, about 15 minutes. Stir in 2 tablespoons water, vinegar and 1/8 teaspoon salt. Keep warm over very low heat, stirring occasionally.
- Preheat the grill or broiler to high. Combine the bulgur, beef, tomato paste, parsley, the remaining 1/8 teaspoon salt and pepper in a medium bowl; knead thoroughly to combine. Shape into two 3/4-inch-thick patties. Grill or broil on a lightly oiled rack until browned and cooked through, about 5 minutes per side. Place the patties on buns, top with the caramelized onions and garnish with lettuce.