Chicken Gyros

Name: Chicken Gyros
Ingredients: 1 cup Plain, Non-fat Greek Yogurt; 2 Tablespoons Plus 1 Teaspoon Fresh Dill, Chopped, Divided; 4 teaspoons Lemon Juice, Divided; 1 clove Garlic, Minced; 1 pound Boneless, Skinless Chicken Thighs, Cut Into 1/2 By 2 Strips; 1 teaspoon Dried Oregano; Salt And Pepper, to taste; 2 Tablespoons Olive Oil; 6 whole Leaves Romaine Lettuce; 30 whole Grape Tomatoes, Halved; ½ whole White Onion, Very Thinly Sliced; 6 whole Thick Fresh Pita Rounds