Pre-heat oven to 180ºC. Line a baking tray with baking paper.
Place rice, egg and flour in a bowl and mix well. Spoon tablespoons of the mixture onto prepared tray and press down to flatten out to a circular shape.
Bake for 8 minutes. Decorate with peas as eyes and tomato wedges for mouth. Return to oven and bake a further 5 minutes.