This Keto Reuben is an Open-Faced Sandwich made with plenty of corned beef, cheese, sauerkraut, and thousand island dressing. piled on top of one half of a low carb Rye Bagel. This hearty bagel melt is perfect for using up any leftover meat you may have from your corned beef dinner!

The popular Reuben Sandwich just got a keto makeover! This low carb bagel melt has all the flavor and comfort you get from the original recipe. And, you will get that comfort food satisfaction when you have this on your plate!

Keto Reuben Bagel Melt on a wooden plate with multi-colored striped napkin in background

Why I made this Keto Reuben Sandwich

My very favorite sandwich pre-keto was the Reuben. I loved the buttery toasted rye bread combined with the salty corned beef and tangy sauerkraut. Buttery swiss cheese and a sweet and tangy Thousand Island Dressing were just the icing on the this corned beef sandwich!

I knew I had to have a low carb version that I would be able to enjoy when I had the craving for a Reuben. So, in preparation of this sandwich, I went ahead and created a Keto Rye Bagel and a sugar-free Thousand Island Dressing recipe. This was a double win for me because the dressing also happens to be Grumpy’s favorite dressing of all time!

Open Faced Keto Reuben Bagel Sandwich on cookie sheet

What is a Keto Reuben Open-Faced Sandwich?

What is a keto reuben sandwich?

The Keto Reuben is a low carb version of an American Grilled Sandwich made up of corned beef, sauerkraut, cheese, and Russian Dressing. I used a Keto Rye Bagel instead of bread and used a sugar-free Thousand Island Dressing to sauce it up!!

What kind of meat do you eat on a Keto Reuben Sandwich?

The traditional meat is corned beef. You can buy it at the deli, or you can used leftover corned beef from a roast. However, I have used turkey or pastrami. When you use pastrami, you do have what is called the “Rachael”. I feel you can add any type of protein that is your preference.

Can I substitute Coleslaw for Sauerkraut?

You can, but that again, turns this Keto Reuben into a Rachael sandwich, especially if you use pastrami! I personally love the tang of sauerkraut in this sandwich!

What kind of dressing do you use in a Keto Reuben Sandwich?

The traditional is Russian. We prefer Thousand Island Dressing. The flavors however, are very similar where the Russian may have a sweeter side (and no pickles).

What do you eat with a Keto Reuben Sandwich?

When your eating a Keto Reuben, I recommend eating a low carb dill pickle! You can also find keto-friendly chips, but honestly, you won’t need anything but this sandwich as it is very filling!

How to make your Open-Faced Keto Reuben Sandwich

Time needed: 14 minutes.

A quick and easy lunch for two made right in your toaster oven!

  1. Prepare your ingredients.

    Slice your bagel in half and assemble ingredients needed for sandwich.Bagel sliced in half with sauerkraut, dressing, and corned beef slices assembled around the bagel in preparation for assembly.

  2. Add the Thousand Island Dressing

    Place 1 tablespoon dressing on top of each bagel half.Each bagel half with Thousand Island Dressing added as first layer.

  3. Add the meat layer.

    Place 2 oz corned beef slices and 1 tbsp sauerkraut on top of the dressing layer.1/2 of bagel shown with corned beef and sauerkraut on top. Swiss cheese slices to the right of bagel and sauerkraut in background

  4. Add cheese layer broil.

    Place cheese slice on top of sauerkraut and place bagel in toaster oven on the broil setting.Bagel sandwiches assembled with all layers with cheese being on the top.

  5. Broil.

    Broil sandwiches until cheese has melted and started to brown. Remove from toaster oven and enjoy!Broiled sandwich on baking sheet

You may need

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When I am making lunch for just myself or even for just Grumpy and I, I hate to heat my oven up for just a small sandwich. That is why I LOVE my Hamilton Beach Toaster Oven. Not only does it quickly heat up, but it has my keto reubens hot and toasty in no time flat!

Other Recipes made with leftover Corned Beef

Yield: 2 open faced sandwiches

Keto Reuben - Open Faced Sandwich

Keto Reuben - Open Faced Sandwich

A low carb, open-faced version of the popular Reuben Sandwich made with a homemade Keto Rye Bagel and Sugar-Free Thousand Island Dressing

Prep Time 7 minutes
Cook Time 7 minutes
Total Time 14 minutes



  1. Pre-heat toaster oven on broil while assembling your sandwich
  2. Slice bagel in half and cover each half with 1 tablespoon Thousand Island Dressing.
  3. Place 2 oz corned beef on each bagel half.
  4. Place 1 tbsp (or more if you wish) sauerkraut on top of corned beef.
  5. Lay 1 oz slice swiss cheese on top of sauerkraut.
  6. Place in toaster oven and broil until cheese is melted and bubbly.


Net Carbs = 5.5

Nutrition Information:



Serving Size:

1/2 bagel sandwich

Amount Per Serving: Calories: 321 Total Fat: 24.5g Cholesterol: 67mg Sodium: 741mg Carbohydrates: 7g Fiber: 2.5g Protein: 19g
Nutrition information calculated using myfitnesspal is provided as a courtesy, but will vary depending on the specific brands of ingredients you use. Please consult with your doctor regarding specific health needs.