Melt the peanut butter and honey for 20 seconds in the microwave and mix them together.
Add the oats and a chopped up Grenade Bar and mix well.
Press 1/2 of the mixture into a lined tin (approx 25x25cm), add a layer of protein spread and press the rest of the mixture on top.
Melt the remaining spread and drizzle over the top, then refrigerate overnight (or at least for a few hours).
Slice into bars and enjoy!