Preheat the oven to 375°F. Wrap a sage leaf and a strip of bacon around the skin in between each sausage link. Place a large, ovenproof skillet on the burner, add the sausages and cook until golden brown on all sides – about 8 to 10 minutes.

Add the leeks and garlic, and sautée along with the sausages.

Turn up the heat to high and add the wine, butter and thyme, letting it bubble so that the wine is reduced slightly. Place the pan in the oven for 20 minutes.

This should allow the gravy to thicken a little. The casserole should be seasoned carefully as the bacon is quite salty. Serve piping hot with roasted root vegetables or creamy mashed potatoes.