Set your Q up for indirect cooking with a convection tray and trivet. Preheat your Q on HIGH. Please refer to your handbook for further instructions.
Lightly grease a small Q Ware Frying Pan with butter.
Combine the butter and brown sugar. Sift the baking powder and flour into the mixture. Stir until combined. Press the mixture into the base of the Q Ware Frying Pan.
After the 10 minute preheat, set the barbecue to the roast setting. Please refer to your handbook for applicable barbecue settings. Bake in the Q for 10 minutes or until golden.
While the base is cooking, place the condensed milk, peanut butter and peanuts in a bowl. Stir until combined.
Remove the slice from the Q using the detachable handles and/or heatproof gloves. Set aside for 5 minutes to cool.
Spread the warm strawberry jam evenly over the base. Pour the peanut mixture evenly over the jam.
Return the slice to the Q for 15-20 minutes or until the edges are deep golden and the centre of the slice is just firm to touch.
Cool completely in pan. Turn slice out onto a cooling rack and drizzle with melted dark chocolate (optional). Cut into pieces and serve.