01 -
Heat the oil in a large skillet over medium heat. Add sausages and sear on all sides until golden brown and cooked through (160°F internal temperature), reducing heat if necessary to ensure thorough cooking.
02 -
Remove sausages and set aside. Add onion and garlic to the same skillet and sauté for several minutes until onions are slightly caramelized.
03 -
Stir flour into the onion mixture and cook for one minute. Pour in beef stock to deglaze the pan, scraping up any browned bits from the bottom for flavor. Season with salt and pepper to taste.
04 -
Return sausages to the skillet, nestling them into the sauce. Simmer for an additional 2-3 minutes to meld flavors.
05 -
Place sausages over mashed potatoes and spoon the onion gravy generously over the top.