Preheat the oven to 400f / 200c.
Peel the potatoes and cut into chunks. Place in a pot of salted cold water and bring to the boil.
Cook for 10 minutes til fork tender, but not falling apart, and drain.
While the potatoes are cooking, mix together the rest of the ingredients for the honey mustard sauce; oil, honey, mustard, garlic powder, thyme, salt and pepper.
Place the cooked potatoes into a large bowl and pour over the honey mustard sauce. Use a spoon to GENTLY coat the potatoes in the sauce, taking care not to break them up.
Line a baking sheet with foil and place the potatoes on it in an even layer.
Roast in the preheated oven for 30 to 40 minutes til crispy. Move the potatoes around every 10 minutes to prevent the honey from burning.