Step 1

In a large bowl, combine ground beef, breadcrumbs, milk, onion soup mix, and dried thyme. Mix until combined, then shape into 8 patties.

Step 2

Arrange sliced onion in the bottom of a slow cooker.

Step 3

In a large skillet over medium-high heat, heat the olive oil. Dredge patties lightly in flour, then brown on both sides.

Step 4

Place browned beef patties on top of sliced onion in slow cooker, stacking alternately.

Step 5

Stir together condensed soup, water, and au jus packet and pour over beef patties. Cover and cook on low until beef is cooked through, 4-5 hours.