Chinese-style tofu in lettuce wraps

Ingredients

• 1 clove garlic, finely diced
• 2cm root ginger, peeled and grated
• 4 tablespoons hoisin sauce
• 2 tablespoons reduced-salt soy sauce
• 2 tablespoons rice wine vinegar
• 2 teaspoons lime juice
• 450g tofu, pressed (if necessary)
• 1 x 225g can water chestnuts, drained and finely chopped
• 2 red peppers, finely diced
• 4 spring onions, finely sliced
• Light cooking spray oil
• 12 outer leaves from little gem lettuce, washed