Make the sauce first. In a bowl, mix Greek yogurt, finely grated cucumber (squeeze out extra water), minced garlic, chopped dill, lemon juice, a drizzle of olive oil, salt, and pepper.
Taste and adjust. Chill to let flavors meld.
Prep your veggies. Chop romaine, slice cucumber, halve tomatoes, mince red onion, and chop parsley or mint. Pit and slice olives if needed.
Crumble or cube the feta.
Season the meat. In a mixing bowl, combine the ground meat with oregano, cumin, garlic powder, onion powder, smoked paprika, coriander, salt, and pepper. Mix gently to avoid compacting.
Cook the meat. Heat a skillet over medium-high with a little oil. Add the meat and cook, breaking it up, until browned and cooked through.
Stir in a minced garlic clove and a squeeze of lemon at the end. Taste and adjust salt.
Optional: Cauliflower rice base. If using, sauté riced cauliflower in olive oil with salt, pepper, and a pinch of garlic powder until tender, 4–6 minutes. Finish with a squeeze of lemon.
Assemble bowls. Add greens (and cauliflower rice if using).
Top with a generous scoop of gyro meat, cucumbers, tomatoes, red onion, olives, feta, and herbs.
Finish with sauce. Spoon tzatziki over the top. Add a drizzle of olive oil and a sprinkle of oregano or red pepper flakes if you like heat.
Serve and enjoy. Add lemon wedges on the side. Mix everything in the bowl for that perfect bite.