Japanese Chicken Curry

Name: Japanese Chicken Curry
Prep time: 15 min
Cook time: 1 h 5 min
Total time: 1 h 20 min
Cuisine: Japanese
Ingredients: 500g (1 lb) chicken thighs, cut into bite-sized pieces; steamed rice to serve; pickled ginger to serve (optional); 50g (1.7 oz) unsalted butter; ¼ cup plain flour (all-purpose flour); 2 tbsp curry powder (a Japanese brand preferably); 2 tsp garam masala*; 2 tbsp vegetable oil; 2 garlic cloves, finely chopped; 1 small onion, finely diced; ¼ cup soy sauce; 1 tbsp honey; 2 tsp apple cider vinegar; ¾ cup apple juice; 2 cups chicken stock; 2 peeled potatoes, cut into bite-sized pieces; 1 carrot, cut into bite-sized pieces; chilli powder to taste; sea salt to taste