Cook the frozen mashed sweet potato and couscous mix according to packet instructions (7 minutes in the microwave for the couscous and 5 minutes for the sweet potato)

Mix the sweet potato and couscous together in a bowl, add tamari and taste - add pepper to taste

Stir in the egg

Add the breadcrumbs and mix well

Press half the burger mix into a lightly oiled 9cm round pastry cutter, remove the pastry cutter carefully, pushing the burger mix down gently with your fingertips as you go (or forgo the cutter and form it all into a rustic burger shape with your hands!)

Repeat with the remaining mixture

Chill for half an hour

Cook on a hot grill for 10 - 15 minutes, turning occasionally or in an oven at 200C for 15 - 20 minutes, turning once

Serve in soft burger baps with your favourite trimmings