Start by heating the 25g butter substitute in a large pan and cook the apple pieces with the lid on for 10 minutes, adding in the Marsala wine half way through the cooking time. Remove off the heat and transfer into an ovenproof dish. Next, quickly prepare the crumble topping by rubbing the flour and butter substitute together in a bowl till the mixture resembles breadcrumbs. Stir in the fresh breadcrumbs, 75g grated Parmesan, chopped thyme and the lemon zest. Spoon the mixture over the cooked apples and finally sprinkle over the remaining 25g grated Parmesan. Bake in the oven at 200`c for 20-25 minutes, or until golden brown. Meanwhile, grill or pan fry the Maltese sausages and serve with the delicous savoury apple and Parmesan crumbs.