Melt cooking fat in a skillet over medium heat.
Cooking fat
Brown the sausages on all sides for 6 to 8 minutes and set aside.
6 to 8 sausages
Add the onions to the skillet and cook while stirring until caramelized, about 12 to 15 minutes.
2 onions
Pour in the balsamic vinegar and add the garlic; mix everything together.
2 garlic cloves, 2 tbsp. balsamic vinegar, Sea salt and freshly ground black pepper
Pour in the beef stock and bring to a light simmer for 4 to 5 minutes. Add 1 tbsp. of tapioca starch mixed with equal parts water for a thicker sauce.
2 cups chicken or beef stock, 1 tbsp. tapioca starch
Add the sausages back and cook until cooked through.
Serve the sausages with the onion gravy and sprinkle with fresh parsley.
Fresh parsley