Multicooker Directions: In Step 1, place the browned brisket pieces in the inner pot of a 6-quart multicooker. Continue with Step 1, adding the cooked onion mixture to the pot; stir in the beets, parsnips, rye berries, salt, and remaining 4 cups stock. Lock the lid; turn Pressure Valve to "Venting." Cook on SLOW COOK [Normal] until the brisket is very tender, about 8 hours. Turn off the cooker. In Step 2, remove the brisket pieces; set aside. Add the cabbage and vinegar to the pot. With the lid off, press SAUTÉ [Normal]; cook, uncovered, just until the cabbage is wilted, stirring occasionally. Meanwhile, complete Step 3.