Heat little oil in sauté pan, add minced garlic till the aroma of garlic is left, then add chopped ginger, mix them for 1min, add tomato ketchup 4-5tbsp add 3-4 tbsp water stir them for 2-3 mix, add soya sauce 2tbsp, add 1tsp vinegar, add the bell pepper, sauté them for 3-4min. Sauce is prepared