Choose your protein: pork, chicken, lamb, beef, or a mix
Slice the meat thinly
Make a marinade with olive oil, lemon juice, garlic, oregano, thyme, rosemary, salt, and black pepper
Add the meat to the marinade
Refrigerate for at least 2 hours or overnight
Prepare tzatziki with Greek yogurt, grated cucumber, garlic, lemon juice, dill, olive oil, salt, and pepper
Slice tomatoes and onions
Warm pita bread
Cook the marinated meat in a hot skillet, grill, or oven until browned and fully cooked
Slice or chop the cooked meat
Fill each pita with meat
Add tomatoes, onions, and tzatziki
Add lettuce or fries if desired
Fold and serve immediately