Turkish Chicken Skewers

Name: Turkish Chicken Skewers
Cuisine: Middle Eastern
Ingredients: 500g boneless chicken breast or thigh, cut into 1-inch cubes; 1/2 cup plain yogurt; 3 tbsp olive oil; 2 cloves garlic, minced; 1 tbsp tomato paste; 1 tsp ground cumin; 1 tsp paprika; 1/2 tsp ground coriander; 1/2 tsp chili flakes (optional, for a bit of heat); Salt and black pepper to taste; Juice of half a lemon; For the Skewers; Wooden or metal skewers (soaked in water if using wooden); Fresh parsley, chopped; Lemon wedges for serving