For the tzatziki sauce, mix together the Greek yogurt, garlic, lemon juice, grated cucumber, dill and salt. Cover and refrigerate until ready to use.
1
Heat grill over high heat. In a large mixing bowl, gently fold the ground lamb, garlic, feta, mint, oregano, salt, pepper and crushed red pepper flakes just until combined.
2
Now it's time to make the ground lamb patties. Evenly divide ground lamb mixture into four balls and form into 4-inch patties.
3
Place burgers on hot grill. Cook for two to three and a half minutes on one side, depending on desired doneness, and then flip and cook for the same amount of time.
4