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    Home » Recipes » Lunch » Roast Beef Mushroom Melt

    Modified: Jul 9, 2025 · Published: May 4, 2020 by Angela G. · This post may contain affiliate links.

    Roast Beef Mushroom Melt

    150 shares
    Jump to Recipe

    This Roast Beef Mushroom Melt open-faced sandwich is loaded with flavorful ingredients: sour dough bread, deli roast beef, melted Havarti cheese, mushrooms and onions cooked in a delicious Marsala sauce and the topped off with peppery arugula.

    Open-faced Roast Beef Melt with Mushrooms
    Roast Beef Mushroom Melt
    Roast Beef Sandwich
    Roast Beef Sandwich Melt
    Open-faced Roast Beef Melt with Mushrooms
    Roast Beef Mushroom Melt
    Roast Beef Sandwich
    Roast Beef Sandwich Melt

    This recipe was developed in partnership with Smith’s.

    Skim by Section
    • ★ Why You'll Love this Recipe ★
    • ★ Ingredients You'll Need ★
    • ★ Tips & FAQs ★
    • ★ More Sandwich Recipes ★
    • Roast Beef Mushroom Melt

    ★ Why You'll Love this Recipe ★

    Savory and Stacked

    This open-faced Roast Beef Mushroom Melt is layered with sourdough bread, deli roast beef, melty Havarti cheese, marsala mushrooms and onions, and topped with peppery arugula.

    Warm and Comforting

    Every bite is rich and cozy, thanks to earthy mushrooms, sweet marsala sauce, and gooey cheese paired with tender roast beef.

    Easy to Make

    It looks and tastes gourmet, but this sandwich comes together quickly using just a few simple ingredients.

    Open-faced Roast Beef Melt

    Bold Flavor, Simple Ingredients

    Each ingredient builds on the next, creating big, savory flavor in every bite—no exaggeration.

    It starts with high-quality roast beef—homemade or deli-style. I used Smith's, a local brand known for tender, seasoned, and smoked cuts. For cheese, Havarti is my top pick. It melts beautifully and adds a creamy, buttery richness. Swiss or provolone also work, depending on your taste.

    ★ Ingredients You'll Need ★

    You'll gather 8 ingredients plus salt and pepper to make this sandwich.

    Here's a look at everything you'll need.

    • Havarti cheese. You could also use provolone or Swiss.
    • Sour dough bread. Bakery fresh is best.
    • Onion. I prefer white onion.
    • Mushrooms. Sliced white onions or baby portabellas.
    • Butter. Salted.
    • Marsala. You can find this cooking wine at most groceries stores.
    • Arugula. This adds a nice peppery flavor.
    • Salt and pepper to taste.

    ★ Tips & FAQs ★

    What can I use instead of marsala wine?

    You can substitute with red wine, sherry or just leave it out. You'll loose a bit of flavor if you leave it out so it's worth a trip to the store to pick some up if you can!

    Can I use lettuce instead of arugala?

    You could. But. Argula has a naturally peppery taste to it that goes really well with this sandwich. If at all possible, definitely try to use arugula instead of lettuce. A blend of baby spinach and arugala would be ok too as sometimes those are packaged together.

    What kind of mushrooms go with roast beef?

    Any, really! Mini portabellas are delicious but regular white mushrooms are excellent too. You could go for canned mushrooms, but I prefer using fresh so that when you sauté them in the marsala, they soak in that extra flavor.

    Special thanks to Smith’s!

    Smith’s, headquartered in Erie, PA has graciously allowed Mighty Mrs. to publish this recipe for Roast Beef Mushroom Melt open-faced sandwiches to inspire families with new ways to cook their prepared meats. You can show your gratitude and support by connecting with Smith's on Facebook: facebook.com/smithshotdogs and on Instagram: instagram.com/smithshotdogs. If you're located in the tri-state area, you can find Smith's meats at your local grocer or chain retailer. Visit Smith's website site for a complete list of locations.

    ★ More Sandwich Recipes ★

    • Chicken Caprese Sandwich
      Chicken Caprese Sandwich
    • Grilled Veggie Sandwich with Feta
      Grilled Vegetable Sandwich
    • 2-Minute Avocado Pesto Sauce Sandwich
      Veggie Melt Sandwich
    • BBQ Chicken Sandwich with Ranch Slaw
      BBQ Chicken Sandwich

    Want more delicious lunch ideas?

    Browse all my lunch recipes.

    This roast beef mushroom melt sandwich was featured on South Your Mouth!

    Roast Beef Mushroom Melt

    Roast Beef Mushroom Melt

    Author: Angela G.
    This Roast Beef Mushroom Melt open-faced sandwich is loaded with flavorful ingredients: sour dough bread, deli roast beef, melted Havarti cheese, mushrooms and onions cooked in a delicious Marsala sauce and the topped off with peppery arugula.
    5 from 1 review
    Reviews
    Course: Brunch, Dinner, Lunch
    Cuisine: American
    Skill Level: Easy
    Prep Time: 10 minutes minutes
    Cook Time: 10 minutes minutes
    Total Time: 20 minutes minutes
    Servings: 4 Servings
    Yield: 4 sandwiches

    Equipment

    • toaster oven
    • skillet

    Ingredients 

    • ¼ lb deli roast beef sliced or shaved
    • 4 slices Havarti cheese
    • 4 slices sour dough bread
    • 1 onion sliced
    • ½ cup sliced mushrooms
    • 4 tablespoon butter
    • ¼ cup Marsala cooking wine
    • ½ cup arugula
    • salt and pepper to taste
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    Instructions

    • Cook mushrooms and onions. Melt butter in a skillet over medium heat. Sauté onions and mushrooms until onions are translucent and mushrooms become glossy.
    • Make sauce. Add marsala wine and deglaze pan by gently scraping the sides and bottom and stirring. Let bubble uncovered for about 5 minutes or until liquid has evaporated then remove from heat and set aside.
    • Layer sandwich. Top each slice of bread with roast beef then layer on a slice of Havarti cheese on each open-faced sandwich.
      Layer mushrooms and onions on top of the cheese then toast the sandwiches in a toaster oven until cheese is melted and bread is golden brown.
      You'll create 4 open-faced sandwiches total.
    • Season and add arugala. Before serving, top with salt, fresh cracked pepper and finally arugula then serve warm.

    Notes

    You can toast in a conventional oven at 400˚for 4-6 minutes if you don't have a toaster oven. 

    Nutrition Facts

    Calories: 442kcal | Carbohydrates: 39g | Protein: 21g | Fat: 21g | Saturated Fat: 13g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 6g | Trans Fat: 1g | Cholesterol: 71mg | Sodium: 1117mg | Potassium: 278mg | Fiber: 2g | Sugar: 6g | Vitamin A: 632IU | Vitamin C: 16mg | Calcium: 298mg | Iron: 3mg
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