1-Getting started: Getting started with this Salisbury Steak Casserole is as easy as preheating your oven and gathering your ingredients. First, heat your oven to 350°F (175°C) and get everything chopped and measured out to keep things smooth. This step ensures your casserole comes together quickly, in just about 30 minutes total, perfect for busy nights.

2-Mixing the beef: Next, in a large bowl, mix the 1.5 pounds of lean ground beef with 1/3 can of French onion soup and 1/8 teaspoon of black ground pepper until it’s well combined. If you’re adapting for dietary preferences, swap the beef here as needed. Then, shape the mixture into patties and brown them in a skillet over medium heat for a few minutes to lock in that savory flavor.

3-Preparing the gravy and assembling: Once the patties are browned, prepare the gravy by blending the remaining 2/3 can of French onion soup with 1 (10.5-ounce) can of cream of mushroom soup, 1 packet of dry onion soup mix, 3 tablespoons of all-purpose flour, 1/4 cup of ketchup, 1/2 cup of water, 2 tablespoons of Worcestershire sauce, and 1 teaspoon of mustard powder. Add optional sliced mushrooms if you want an extra boost of taste. Layer the browned beef in a casserole dish, top with the 1 (14.5-ounce) can of drained French cut green beans, and finish with 2 to 3 cups of prepared mashed potatoes.

4-Baking and serving: Bake everything at 350°F (175°C) for 20 minutes until it’s bubbly and golden. Similar to other easy casseroles on the site, this one lets you tweak steps for your family’s tastes. Let it rest a bit before serving to keep the textures just right for about 8 people.