Baked Chicken Shawarma Perfect for Leftover Rotisserie Chicken

Name: Baked Chicken Shawarma (Perfect for Leftover Rotisserie Chicken)
Ingredients: 2 teaspoons coriander; 1 teaspoon allspice; 1 teaspoon cumin; 1 teaspoon ground ginger; 1 teaspoon turmeric; 1/2 teaspoon cinnamon; 1/2 teaspoon cayenne; 1/2 teaspoon pepper; 1 teaspoon salt; 3 tablespoons lemon juice; 2 tablespoons olive oil, plus 1 tablespoon for crisping on the stove; 2 garlic cloves, minced; 2 pounds boneless, skinless chicken thighs; 6 pita; 1 red onion, thinly sliced into half moons; 1 cup parsley, finely chopped; 3 cups shredded red cabbage; 1 cup pickled turnips; 1/2 cup tahini