Well, my best advice would be to do an Advanced Search on Google and type in the exact phrase "minted lamb burgers". You get 211 hits, not all appropriate. But you can look through them for the ingredients you tasted and the presentation you experienced.
Here's one that looks easy and great. I love lamb, ground or otherwise, and I have a huge pot of fresh spearmint outside my kitchen door. I will try this, WITH the grilled eggplant slices, as suggested (I'm also growing Japanese eggplant in pots).
MINTED LAMB BURGERS
Can be prepared in 45 minutes or less.
1/4 English cucumber
1/2 cup plain yogurt
1/4 cup chopped fresh mint leaves
1 1/4 pounds ground lamb
1/2 teaspoon ground cumin
four 4-inch pita loaves
1 1/2 cups shredded romaine Accompaniment: 8 eggplant slices, grilled
Seed and chop cucumber. In a small bowl stir together cucumber, yogurt, 2 tablespoons mint, and salt and pepper to taste. In a large bowl blend together lamb, cumin, remaining 2 tablespoons mint, and salt and pepper to taste. Form mixture into four 1-inch-thick patties. When forming patties, handle meat as little as possible for a juicier burger.
Grill burgers on an oiled rack set 5 to 6 inches over glowing coals about 4 1/2 minutes on each side for well-done. (Alternatively, burgers may be cooked in a hot well-seasoned cast-iron skillet or ridged grill pan.)
Toast pita loaves and split horizontally. Transfer burgers to pitas and top with cucumber mixture, eggplant, and romaine.
Makes 4 Servings.