Step-by-Step Directions:
Step 1: Prepare the Baking Dish
Preheat the oven to 350°F. Lightly grease a 9×13-inch baking dish. Lay the beef slices flat on a clean surface. If needed, gently pound them to an even thickness for consistent cooking.
Step 2: Add the Filling
Place one slice of Swiss cheese on each piece of steak. Trim or fold the cheese if it overhangs. Add a small spoonful of drained mushrooms near one end of each slice.
Tip: Avoid overfilling—keeping the filling modest helps seal the rolls and prevents the cheese from melting out too early.
Step 3: Roll and Arrange
Roll each piece of steak tightly around the filling. Place them seam-side down in the baking dish. Arrange them close together to help them stay secure without using toothpicks.
Step 4: Add the Gravy
Stir the condensed gravy until smooth, then pour it evenly over the rolls.
Tip: If the gravy is too thick, mix in 2–3 tablespoons of water or beef broth. It should be pourable while still coating the meat well.
Step 5: Bake Covered
Cover the dish tightly with foil and bake for 45–60 minutes. The covered environment helps retain moisture, allowing the beef to become tender.
Step 6: Finish Uncovered
Remove the foil and continue baking for an additional 5–10 minutes. This step helps the gravy thicken and lightly caramelize. Let the rolls rest for about 5 minutes before serving so the cheese can set slightly inside.
