Chicken Shawarma Sandwich

Name: Chicken Shawarma Sandwich
Ingredients: FOR THE CHICKEN SHAWARMA:; 2 pounds Boneless Skinless Chicken Breasts, Thinly Cut; ¼ cups Vinegar; 1 cup Yogurt; 1 teaspoon Ground Black Pepper; 1 teaspoon All Spice; 1 teaspoon Nutmeg Powder; 1 teaspoon Cumin Powder; 1 whole Lemon, Juiced; 2 whole Cardamom Pods; Oil For Cooking Chicken; FOR THE SANDWICHES:; 6 whole Pita Breads; 2 whole Tomatoes, Chopped; 2 whole Cucumbers Chopped; 1 sprig Parsley, Chopped; Hummus Or Garlic Sauce, To Taste