For 12 honey and walnut biscuits:
To prepare the walnut biscuits start heating the oven to 180°C (160° fan). Line a large baking tray with non-stick baking paper.
Gently melt the butter and honey in a pan over a low heat. Remove from the heat and add the bicarbonate of soda.
Put the flour, oats, walnuts and sugar in a mixing bowl and stir in the honey mixture until blended. Allow to cool slightly.
Place 12 equal heaps of the mixture onto the baking tray and flatten slightly.
Bake for 10-15 minutes until golden. Cool on the baking tray for 5 minutes, then place the walnut biscuits on a wire rack to cool completely.