I found this recipe on myrecipe.com and tried it. It was amazing! I didn't make the sauce for the burgers, but I'm going to try to do that next time.
A simple yogurt-based sauce and a rich feta-and-spice stuffing makes these turkey burgers stand out above the rest. Pair with sautéed zucchini. Heat 2 teaspoons olive oil in a large skillet over medium-high heat.
1/4 cup finely chopped red onion
1 teaspoon dried oregano
1 teaspoon grated lemon rind
1/2 teaspoon salt
1/4 teaspoon freshly ground black pepper
1 pound ground turkey
6 tablespoons (1 1/2 ounces) crumbled feta cheese
1/4 cup grated English cucumber
1/4 cup plain fat-free yogurt
1 tablespoon chopped fresh mint
4 (1/4-inch-thick) slices tomato
4 green leaf lettuce leaves
4 (2-ounce) Kaiser rolls or hamburger buns
1. Combine first 6 ingredients. Divide mixture into four portions. Indent center of each portion; place 1 1/2 tablespoons feta into each. Fold turkey mixture around cheese; shape each portion into a 1/2-inch-thick patty.
2. Heat grill pan over medium-high heat. Coat pan with cooking spray. Add patties; cook 5 minutes on each side.
3. Combine cucumber, yogurt, and mint in a small bowl. Arrange 1 turkey patty, 1 tomato slice, 1 lettuce leaf, and 2 tablespoons yogurt mixture on bottom half of each roll. Top with top halves of rolls.
Sautéed zucchini: Heat 2 teaspoons olive oil in a large skillet over medium-high heat. Add 2 cups sliced zucchini and 2 minced garlic cloves; sauté 5 minutes. Add 2 teaspoons lemon juice, 1/4 teaspoon salt, and 1/8 teaspoon black pepper.