Slice lamb, beef, chicken, or pork thinly
Mix with olive oil, garlic, oregano, thyme, rosemary, lemon juice, salt, and black pepper
Marinate the meat for at least 1 hour or overnight
Heat a skillet, grill, or oven to medium-high heat
Cook the meat until browned and fully cooked
Warm pita bread
Prepare toppings such as sliced tomatoes, onions, lettuce, and cucumber
Make tzatziki by mixing Greek yogurt, grated cucumber, garlic, lemon juice, dill, and salt
Fill each pita with meat and toppings
Add tzatziki sauce
Serve immediately