in the slow cooker: Scatter the sliced onions evenly over the bottom of a 4- to 6-quart slow cooker. They form the bed that will soften, sweeten, and eventually become the base of your gravy.
Add the sausages: Nestle the sausages on top of the onions in a single layer if possible. They will sink down into the onions as everything cooks and softens.
Mix the simple gravy base: In a measuring cup or bowl, stir together the beef stock and
