Begin by marinating the chicken. In a bowl, combine olive oil, 1 tablespoon of lemon juice, minced garlic, salt, paprika, and cumin. Mix thoroughly.
Add the chicken breast to the marinade. Ensure each piece is fully coated. Let it marinate for a minimum of 30 minutes.
While the chicken is marinating, prepare the yogurt sauce. Combine Greek yogurt, 1 tablespoon of lemon juice, diced cucumber, fresh dill, salt, and pepper. Stir until all ingredients are well mixed. Refrigerate to allow flavors to meld.
Preheat your grill to medium-high heat.
Once heated, place the marinated chicken on the grill. Cook for 6-7 minutes on each side or until fully cooked.
While the chicken cooks, warm your pita bread either on the grill for 1-2 minutes each side or in a heated oven.
Slice the grilled chicken into thin strips.
To assemble your High Protein Grilled Chicken Gyros, spread a generous amount of yogurt sauce on the pita.
Layer with sliced chicken, diced tomatoes, sliced onions, and chopped lettuce.
Fold the pita bread over the fillings and your gyro is ready to devour!