Spanakopita Chicken Burgers

Name: Spanakopita Chicken Burgers
Ingredients: * 1 pound ground chicken breast; * 1/4 cup plus 1 tablespoon red onion, minced; * 1/4 small onion, grated; * 2 large garlic clove, grated; * 1/2 teaspoon salt; * 1/4 teaspoon pepper; * 1 2 ounce jar chopped pimento; * 4 cup fresh chopped spinach (about a full 6 ounce bag spinach); * 8 ounce feta, roughly chopped; * 2 tablespoon milk; * 2 teaspoon cornstarch; * generou pinch cinnamon; * salt and pepper to taste; * thinly sliced red onion; * 6 pita pocket