Preheat the oven to 180°C/350°F/Gas mark 4
Toast half the oats ona skillet over a mediaum heat, stirring frequently until the oats color and become fragrant (5 minutes or so). Toast the remainder. Mix the bananas, syrup, vanilla and brown sugar. Add in the toasted grains while warm. Stir in the remaining ingredients.
Pour some wholemeal flour into a dish. Scoop up around a tablespoonful of the dough and dip one side into the wholemeal flour. Stick the floured side onto the baking sheet, to prevent sticking. Bake for 10-12 minutes, or until lightly browned. Transfer to a wire rack to cool.