Gently mix all lamb burger ingredients in a bowl until just combined.
Gently form meat into 4-5 patties. Press down the middle to make a small indent. This will ensure even cooking.
Cover and refrigerate the lamb patties for at least 10 minutes (up to 4 hours) while the grill heats up.
While the burgers rest in the fridge and the grill heats up, combine the tzatziki ingredients together in a bowl and chill in the fridge until ready to serve.
GRILL RECIPE: Once the grill reaches medium-high heat, oil the grill with a little avocado oil and place the lamb patties on top.
Cook until crust forms and the patty easily releases from grill, about 4 minutes. Cook for around another 3 minutes, or until the internal temperature reaches 150 degrees. (They can still be slightly pink in the center).
INDOOR RECIPE: Heat a large cast-iron skillet over medium high heat. Add avocado oil in the skillet. Once the oil is hot, add burgers and cook until a crust forms and easily releases from the skillet. About 3-4 minutes per side, and the temperature reaches 150 degrees.
Once the burgers are done, serve on a bun, with the tzatziki sauce piled high! I love sliced red onions, lettuce, cucumbers (or pickles), and tomatoes on top as well. ENJOY!