1. Preheat oven to 180°C.
2. Place pears, rhubarb, sugar and water in a saucepan, cover and cook for 8-10 minutes until softened. Spoon fruit into an ovenproof dish.
3. Combine honey and margarine in a small bowl and microwave on High (100%) for 20 seconds.4. In a separate bowl, combine muesli and flour. Stir in honey mixture, mixing until the crumble resembles coarse breadcrumbs. Spread over fruit and bake for 20-30 minutes until golden. Serve hot.
Variation: Substitute nashi fruit or apples for pears.