Preheat oven to 170°C. Melt butter and oil over medium heat in a large baking dish or ovenproof frypan, add potato and onion and cook, stirring, for 10-15 minutes until starting to soften and turn golden. Season with salt and pepper, and add thyme and half the vinegar. Cover with foil and place in oven for 20 minutes. Remove foil, add remaining balsamic and return to oven for a further 20-30 minutes until golden and cooked through.
Serving size: 6
Recipe courtesy of taste.com.au