3
In a 5 to 6-quart slow cooker, add a small layer of the tomato mixture to the bottom of the dish, then add a layer of no-cook lasagna noodles (it’s okay if you have to break them up a bit to get them to fit). Then add half of the steak, half of the Provolone slices, and half of the mushroom and pepper mixture. Top with another layer of noodles, the rest of the steak, the last of the Provolone, and tomato sauce mixture, leaving some of the tomato sauce mixture for the top.