In a bowl, mix the ground beef, onion, garlic, butter, lemon juice, panko, parsley, eggs, oregano, cumin, chili powder, thyme, salt, and pepper.
Shape into 6–8 oval patties and freeze 20 minutes to firm.
Grill over medium-high heat for 4–5 minutes per side, until internal temp reaches 160°F. Let rest before assembling.
Stir together the yogurt, garlic, lemon juice, olive oil, and dill.
Season with salt and pepper
Toss the cucumbers, tomatoes, red onion, oregano, olive oil, and lemon juice.
Season with salt and pepper
Warm naan or pita.
Add the grilled beef, tzatziki, cucumber salad, feta, and optional hummus or pita chips.
