Heat a tablespoon of vegetable oil in a frying pan (wok or pan) over a medium-high heat.
1 tbsp Oil
Add chopped carrots and sliced onions to the pan and stir-fry for 2 to 3 minutes or until the carrots have softened and the onions have started to caramelise.
2 Carrots, 1 Onion
Add curry powder, diced garlic, ginger, black pepper and turmeric to the pan and stir ensuring that the spices are evenly distributed.
2 Garlic Cloves, 1 tsp Ginger, ½ tsp Black Pepper, 1 tbsp Curry Powder, ½ tsp Turmeric
Add flour to the onions and carrots and stir until evenly distributed, then add soy sauce and honey to the pan and stir.
Slowly add chicken stock to the pan and mix thoroughly. Leave the sauce to simmer for 10 to 15 minutes or until the mixture has thickened and the carrots are soft.
600 ml Chicken Stock
Pour the sauce into the blender and blitz until it reaches a smooth and thick consistency or skip this step if you want chunks of carrots and onions in it.
Video
Notes
Make This Recipe Vegan, Vegetarian Or Gluten-Free
Vegan or vegetarian: You simply need to swap the chicken stock with vegetable stock. If you don't eat honey, then you can use sugar as an alternative.Gluten-free: Instead of using plain flour you can make a cornflour slurry to thicken the sauce. Simply mix two tablespoons of cornflour with four tablespoons of water.
Japanese Curry Powder
For more of an authentic katsu curry sauce, I've tried using S&B curry powder, it's a Japanese curry powder made from herbs and mild spices. I find it to be a lot sweeter and less spicy than Indian curry powders.Here's a quick tip, if you don’t have any curry powder at hand, garam masala is a good substitute.