Cut the tips from the wings and reserve to make a chicken stock.
In a small bowl mix together the garlic, mustard powder, paprika, thyme,, sugar, cayenne pepper, salt and pepper. Add the lemon juice and blend to a paste. Brush the paste over the wings using a pastry brush
Line a large baking sheet with foil. Arrange the wings on the baking sheet, meaty side down and let stand at room temperature for 30 minutes.
While the wings are standing, preheat an oven to 475ºF. Bake the wings for 15 minutes then turn and continue baking for 15 - 20 minutes until brown and crisp.
To make the Peach Mustard Sauce, melt the jam gently in a small saucepan then stir in the remaining sauce ingredients and stir. Serve in a small dish for dipping.