rhubarb & apple crumble

Oh my, how I love crumbles, I made this gluten free version the other day and shared it with friends, everyone had a glow in their cheeks afterwards.

Filling
4 granny smith apples, peeled and cut into chunks
¼ cup water
½ bunch rhubarb, leaves removed, trimmed, washed and roughly chopped
1/3 cup stevia (or you could use sugar)

Preheat the oven to moderate, 180°C. Lightly grease a medium ovenproof dish or 4 large ramekins. In a medium saucepan, combine apple and water. Bring to boil on high. Reduce heat to medium. Simmer, covered, 4-5 minutes, until almost tender.  Add the rhubarb and sugar. Simmer, stirring for 2-3 minutes, or until rhubarb is just tender. Drain excess liquid. Spoon mixture into the dish or ramekins.

To make the crumble put the flour and butter in a food processor and blitz until the mixture resembles breadcrumbs. Stir remaining crumble ingredients through. Sprinkle evenly over the fruit and bake for 25-30 minutes, until golden and bubbly.