Simple Sukiyaki Beef Udon

Ingredients

• 1 tsp cooking oil
• 1 brown onion (cut into thick rings)
• 400g beef (thinly sliced)
• 2 tbsp Lee Kum Kee gluten-free soy sauce
• 2 tbsp Obento cooking sake
• 2 tbsp Obento mirin
• 2 tbsp water
• 2 tsp brown sugar
• 2 cups water
• 3 tbsp Lee Kum Kee gluten-free soy sauce
• 1 tsp brown sugar
• ½ tsp salt
• 2 large carrots (sliced)
• 1 large leek (sliced)
• 150g of honshimeji, shiitake and enoki mushrooms
• 2 pkts of Obento boiled udon noodle