Grilled Chicken with Tzatziki

1.In a bowl, combine the olive oil, lemon juice, minced garlic, dried oregano, salt, and pepper. Add the chicken breasts to the marinade, making sure they are well coated. Cover and refrigerate for at least 30 minutes, or overnight for maximum flavor.

2.Preheat the grill to medium-high heat. Remove the chicken breasts from the marinade and discard the excess marinade. Grill the chicken for 6-8 minutes per side, or until cooked through and juices run clear. Remove from the grill and let rest for a few minutes.

3.While the chicken is grilling, prepare the tzatziki sauce. In a bowl, combine the Greek yogurt, grated cucumber, minced garlic, chopped dill, chopped mint, lemon juice, salt, and pepper. Stir well to combine.

4.To serve, warm up the flatbread on the grill or in the oven. Slice the grilled chicken and place it on the flatbread. Top with sliced tomatoes, a dollop of tzatziki sauce, and garnish with fresh dill sprigs and mint leaves.