Pre heat the oven to 200C, 400F. Pull the stalks from the large mushrooms and finely chop the stalks with the small mushroom. Heat a non-stick wok or frying pan and add the oil.
Fry the mushrooms, zucchini and red pepper for 1 minute in the wok. Stir in the Patak's Madras Curry Paste, add a tsp of water and allow the paste to cook for 2 minutes.
Meanwhile, cook the basmati rice as directed on the pack and then stir into the wok with the lemon zest.
Place the mushrooms on a baking sheet, pile the filling on top and bake for 15 - 20 minutes, covering with foil to prevent the rice from drying out.
Serve with the lettuce or mixed salad leaves and lemon wedges.