Step 1Preheat oven to 170 °C/ 340 °F (conventional), or 150 °C/ 300 °F (fan assisted). To make the crust, combine all ingredients in a bowl and mix well.
Step 2Line a tray (either 20 x 20 cm/ 8 x 8" or 23 x 15 cm/ 9 x 6" tray) with baking paper, and then pour the mixture in, pressing down firmly. Bake 15 to 18 minutes, until just starting to brown.