Malaysian Chicken Satay

Name: Malaysian Chicken Satay
Ingredients: 500g de-boned chicken thigh (or chicken breast), include the skin and fat; ½ onion; ½ teaspoon salt; 3 teaspoon brown sugar; ½ tablespoon coriander powder; ½ tablespoon turmeric powder; ½ tablespoon cumin powder; ½ tablespoon sweet paprika powder; ½ tablespoon chili powder; 1 tablespoon curry powder; ½ teaspoon sesame oil; 3 shallots – chopped; 1 clove garlic – chopped; 2 red chili – chopped; ¼ teaspoon turmeric powder; 1 tablespoon coriander powder; 1 tablespoon galangal – chopped (substitute with ginger if galangal is unavailable); Juice of 2 limes; 1 tablespoon soy sauce; Salt to taste; 1 tablespoon brown sugar; 2 tablespoon crunchy peanut butter; 125ml water; 2 tablespoon milk; 2 tablespoon vegetable oil (for frying)