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    Recipe Idea Shop » Recipes » Gluten Free

    Portabella Reuben Sandwich

    Published: by Kathy Owen Mar 12, 2021 · "As an Amazon Associate, I earn from qualifying purchases"

    This vegetarian Grilled Portabella Reuben Sandwich is super tasty. You won't even miss the corned beef.

    portabella mushroom reuben sandwich

    Jump to Recipe

    Vegetarian Portabella Reuben Sandwich

    A Portabella Reuben Sandwich is a fabulous vegetarian meal we love.  St. Patrick's Day will be here soon. It generally conjures up an image of Corned Beef and Cabbage, but what if you're a vegetarian?

    What do you eat while having green beer? This sandwich, of course! If you enjoy high-fat, corned beef version, I think you will love this lower-fat alternative. In my opinion, it is to-die-for. This version is gluten-free, made with Udi's Gluten-Free Rye Style Bread. Great bread!

    The original Portabella Reuben Sandwich recipe is from Moosewood Restaurant's New Classics cookbook. It's terrific. The Moosewood cookbook suggests baking the sandwich, but we like it much better grilled with a bit of butter spread on the outside of the bread.

    Our favorite indoor grill is the  Cuisinart Griddler. The Reuben is much more flavorful grilled. The crunchy bread makes all the difference. But the butter does add calories and fat.

    How To Make A Portabella Mushroom Reuben Sandwich

    Someday, I will get my act together and photograph every step. Here are the basic steps (really, it's not hard to make once you get everything together)...

    Heat a skillet or a grill to medium hot (about 350°F)

    Gather the ingredients.

    I agree, it's a lot of ingredients, but you can make the Russian Dressing and the Roasted Portabella ahead of time.

    Ingredients

    Combine the oil, garlic, salt, and pepper in a small bowl and set aside.

    Prepare the mushrooms.

    how to roast portabella mushrooms

    Remove the stems from the portabellas and slice the caps into ½- to ¼-inch-thick slices. Brush the slices with the oil mixture and arrange them on a baking sheet covered with parchment paper.

    Roast or bake the mushrooms at 350 degrees for 4 to 8 minutes on one side, then turn them with a spatula and continue baking for an additional 4 to 8 minutes, until tender and juicy.

    Make Russian Dressing.

    Easy Russian Dressing takes just a few minutes to make.

    Combine all the dressing ingredients in a small food processor or blender and purée until smooth and creamy. Store in the refrigerator for up to one month.

    Layer the sandwich ingredients on the bread.

    Spread the butter on one side of four slices of bread. On the other side, spread the Russian Dressing and place the buttered side down on the grill.
    Layer each slice of bread with ¼ cup of the sauerkraut, ¼ of the portabella slices, and a generous ⅓ cup of the cheese (or 1-2 slices).
    Top each sandwich with a second slice of bread (prepared as the first two slices).
     

    Grill the Reuben.

    Grill for about 4 minutes per side, until the cheese melts and the outside of the bread is nice and toasty brown.
    grilled portabella Reuben sandwich vegetarian style
     
     

    Tools You Need

    Of course, you need a good set of knives, cutting board, measuring cups and spoons, and a baking sheet with a lip. But I suggest you get a griddle, too. We love our Griddler.

    crispy portabella mushroom reuben sandwich

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    grilled portabella Reuben sandwich vegetarian style

    Portabella Reuben Sandwich

    Scrumptious vegetarian alternative to Corned Beef Reuben Sandwich.

    Author: Recipe Idea Shop

    Rate this Recipe Print Pin Save Saved!
    Prep : 12 minutes mins
    Cook : 18 minutes mins
    Total Time: 30 minutes mins
    Course : Main Course, sandwich
    Cuisine : American
    Servings : 4

    Ingredients
     

    Easy Russian Dressing

    • ½ cup diced tomato about ½ a medium tomato
    • ⅔ cup prepared mayonnaise
    • 2 tablespoons chopped scallions—white and tender green parts only 2 scallions
    • 2 teaspoons prepared horseradish
    • 2 teaspoons apple cider vinegar
    • 1 teaspoon salt
    • ½ teaspoon ground black pepper
    • 3 drops Tabasco sauce
    • 2 teaspoons tomato paste
    • ⅛ teaspoon lemon juice

    Portabella Reuben Sandwich

    • 8 slices plain or toasted Udi's Gluten Free Rye Style Bread or standard rye bread
    • 4 large portabella mushrooms rinsed and dried, about 8 ounces
    • 3 tablespoons olive oil
    • 2 garlic cloves minced
    • 1 dash salt
    • 1 dash ground black pepper
    • 1 cup drained sauerkraut
    • 1½ cups grated or sliced Swiss cheese
    • 2 tablespoons Russian Dressing recipe included

    For Option 1 Only

    • 8 tablespoons butter
    Get Recipe Ingredients

    Instructions
     

    Easy Russian Dressing Directions

    • Combine all the dressing ingredients in a small food processor or blender and purée until smooth and creamy.
    • Store in the refrigerator for up to one month.

    General Portabella Reuben Sandwich Directions (use for both options)

    • Preheat the oven to 450°F.
    • Combine the oil, garlic, salt and pepper in a small bowl and set aside.
    • Remove the stems from the portabellas and slice the caps into ½- to ¼-inch-thick slices. Brush the portabella slices with the oil mixture and arrange on a baking sheet that you have covered with parchment paper.
    • To roast, bake mushrooms on one side for 4 to 8 minutes, then turn with a spatula and bake for 4 to 8 minutes more, until tender and juicy.

    Option 1: Putting It Together and Grilling the Sandwich

    • Heat a skillet or a grill to medium hot (about 350°F)
    • Spread the butter on one side of each of the 4 slices of bread.
    • On the other side, spread the Easy Russian Dressing and place buttered side down on the grill. Layer each slice with ¼ cup of the sauerkraut, ¼ of the portabella slices, and a generous ⅓ cup of the cheese (or 1-2 slices).
    • Top each sandwich with a second slice of bread (on which you have spread Russian Dressing and buttered the other side.
    • Grill for about 4 minutes per side, until the cheese melts and the outside of the bread is nice and toasty brown.
    • Serve immediately.

    Option 2: Baking the Sandwich

    • Reduce the heat to 400°F.
    • Follow all the instructions for grilling the reuben, but do not butter the outside of the bread.
    • Bake the sandwich for about 4 minutes, until the cheese melts.
    • Serve immediately.

    Nutrition (may vary depending on ingredients and amounts used)

    Calories: 911kcal | Carbohydrates: 39g | Protein: 20g | Fat: 76g | Saturated Fat: 28g | Polyunsaturated Fat: 20g | Monounsaturated Fat: 24g | Trans Fat: 1g | Cholesterol: 114mg | Sodium: 1769mg | Potassium: 630mg | Fiber: 7g | Sugar: 7g | Vitamin A: 1185IU | Vitamin C: 11mg | Calcium: 449mg | Iron: 3mg
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    About Kathy Owen

    Kathy Owen acquired the blog, Recipe Idea Shop in 2024. She was raised on a farm in Arkansas where having a big garden and good food to eat was the norm. She shares recipes for homemade comfort food and new trending dishes.

    5 from 1 vote (1 rating without comment)

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