Japanese Yakiniku (Grilled Meat)

Ingredients

• 600 g beef ribeye or short rib (thinly sliced)
• 200 g chicken thigh (cut into bite sized pieces)
• 1 small onion (sliced)
• 1 courgette (sliced)
• 1 red pepper (sliced)
• 100 g shiitake mushrooms (halved)
• 2 spring onions (finely sliced (for garnish))
• 3 tbsp soy sauce
• 1½ tbsp mirin
• 1 tbsp sake
• 1 tbsp sugar
• 1 clove garlic (grated)
• 1 tsp sesame oil
• 1 tsp toasted sesame seeds
• Cooked Japanese rice
• Kimchi (optional)
• Fresh lettuce leaves (optional for wrapping)