Grilled Chicken Kabobs with Yogurt

Name: Grilled Chicken Kabobs with Yogurt
Ingredients: 2 1/2 pounds chicken breast; 2 1/2 teaspoons fresh minced garlic; 1 1/2 teaspoons salt; 1 1/2 teaspoons ginger powder; 1 1/2 teaspoons ground black pepper; 1 1/2 teaspoons ground coriander; 1/2 teaspoon paprika; 1/2 teaspoon crushed red pepper; 6 ounces cooking oil; 2 ounces lemon juice; Pinch saffron; 4 cups plain yogurt; 1/2 ounce white vinegar; 2 1/2 teaspoons dry dill; 2 1/2 teaspoons chopped garlic; 2 teaspoons ground black pepper; 1/2 teaspoon salt; 1 tomato, cut into quarters; 1 purple onion, cut into quarters; 1 bell pepper, cut into quarters; 4 pitas, warmed; Sumac and ground coriander, for sprinkling; Microgreens, for garnish