Preheat the oven to 180°C, combine the flour, rolled oats, coconut, sugar and zest in a small bowl. Add the butter and, using your fingertips, rub the butter into the flour mixture until crumbly.

Put the bananas and plums in a dish (that can hold 5cups size capacity) and pour over the lime juice. Toss to coat in the juice. Sprinklethe crumble mixture evenly over the fruit. Bake for25-30 minutes, or untilthe crumble is golden. Serve hit with ice cream or whipped cream.