'On the side' zingy mushrooms

Ingredients

• 125g shiitake mushrooms, sliced
• 1 teaspoon sesame seed oil
• 2 large field (Portobello) mushrooms, peeled and sliced
• 2cm fresh ginger, peeled and finely sliced
• 2 cloves of garlic, peeled and finely sliced
• 1/4 medium-hot red chilli, finely sliced
• 2 teaspoons of tomato puree
• 2 tablespoons of water
• 1 teaspoon maple syrup (or honey)
• Juice of 1/2 lime
• 2 spring onions, finely sliced
• 1 large handful of fresh coriander leaves, finely chopped