Grouper Reuben Sandwich

Name: Grouper Rueben Sandwich
Prep time: 10 min
Cook time: 9 min
Total time: 18 min
Ingredients: 2 4 oz grouper fillets or you can substitute your favorite white fish; pinch salt; 1/2 tbsp olive oil; 1/4 cup mayo; 2 green onions, sliced; 1/8 cup red onion, diced; 1 tablespoon sweet pickle relish; 1 teaspoon horseradish; 1 tablespoon ketchup; 1/2 teaspoon salt; 1/4 teaspoon paprika; 4 slices rye bread; 1/2 cup sauerkraut; 2 slices swiss cheese; 2 tablespoons butter

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Want to enjoy a delicious classic sandwich in a different way? Try this grouper Reuben sandwich. It's healthy, hearty, and oh so tasty!

One day we were craving some good food, but we weren't exactly sure what. Neither one of us felt like cooking or take-out. So, I came up with this grouper Reuben recipe and this sandwich hit the spot. My family loved it so much, they asked me to make it again the next day! If you're looking for a new twist on an old favorite, try this grouper Reuben recipe tonight. You won't regret it.

horizontal image of a grouper sandwich on a wooden cutting board, another sandwich in the background.

Smoked Meat Sandwich

Normally, I'm not a huge fan of fish. For me, it's an acquired taste; it has to grow on me. But recently my eyes were opened up to the wonderful world of gourmet sandwiches; specifically gourmet grouper Reubens! I can tell you I didn't need time to acquire a taste for this delicious sandwich. If you haven't tried one yet, then you're in for a real treat! You'll never look at a sandwich quite the same way again.

Ingredients

You may not have some of the ingredients to make this grouper Reuben sandwich. But after one quick trip to the grocery store, you'll be glad you made the effort!

grouper filets
salt
olive oil
mayo
green onions
red onion
sweet relish
horseradish
ketchup
paprika
rye bread
sauerkraut
Swiss cheese
butter

See the recipe card for quantities.

How to Make Grouper Reuben Sandwich

Following this sandwich recipe is broken down in these six steps.

Step 1: Preheat the oven

Place oven rack to about 4" away from the broiler. Preheat broiler to high (550ºF)

Step 2: Prepare the grouper

Place grouper fillets in a greased casserole dish. Brush grouper with a half tablespoon of oil. Sprinkle salt evenly over filets.

Step 3: Broil the grouper

Place casserole dish in the oven. Cook grouper filets for 9 minutes or until fish is opaque and the edges begin to brown. DO NOT FLIP.

Step 4: Make the sauce

Combine all ingredients in a medium mixing bowl. Depending on your preference and to alter the flavor, add more salt or horseradish.

Step 5: Assemble the sandwich

Layer one slice of bread, sauce, sauerkraut, grouper filet, cheese, and the second piece of bread. Generously butter the top and bottom of each sandwich.

Step 6: Grill the sandwiches

Heat a pan over medium heat. Add sandwiches and grill them on each side for about 2 minutes or until they're golden brown and the cheese is melted. Serve immediately.

two halves of a grouper reuben stacked on top of one another.

Substitutions

Don't have the exact ingredients on hand? Or want to change something up? Here are a three helpful tips that will slightly change this Grouper Reuben Sandwich.

Fish - instead of group, any type of whitefish can be used.

Cheese - Swap Swiss cheese for Provolone or American cheese to add some tanginess.

Bread - For gluten-free option, gluten-free bread will work fine.

Variations

Want to personalize this Grouper Reuben recipe? Here are some tried and true tips for changing up this recipe.

Spicy - for a spicy kick, add chili pepper flakes to the fish.
Deluxe - top with fresh tomatoes or sliced onions for a delicious fresh taste.
Cole Slaw - Cole Slaw can be used in place of sauerkraut.

If you love gourmet sandwich recipes, then you may also enjoy this Fried Pork Chop Sandwich recipe.

vertical close up image of two grouper reuben sandwiches on top of each other placed on a wooden cutting board.

Equipment

You only need a few kitchen tools to make this beautiful sandwich.

casserole dish
mixing bowl
whisk or spoon
skillet

Storage

Store leftovers in the fridge for up to three days. Just keep the ingredients separate and only assemble the sandwiches when are you're ready to eat them.

Tips

Want to ensure this gourmet sandwich turns out fantastic? Here are my best tips!

You can make your own Thousand Island dressing for this recipe. It's the best. Although bottled will work well also.
I like to toast my rye bread lightly before assembling the sandwich for extra crunch and flavor.
When I'm feeling fancy, I like to use sauerkraut that has been slightly caramelized. If you have time, this is the way to go!

close up image of two grouper reuben sandwiches on top of each other placed on a wooden cutting board.

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FAQ

Do you have questions about Grouper Reuben Sandwich? Here are some of the most commonly asked questions about this recipe.

How do I reheat?

For freshest taste reheat leftover grouper in the oven at 350 for 7 to 10 minutes. Or in a skillet.

Can I use frozen grouper?

Yes, but it's best to thaw it first. If you forget to thaw or are in a hurry add an additional 3 to 5 minutes to the cooking time.

What is Grouper?

Grouper, a fish native to the Atlantic and Gulf coasts of the United States, is a white flaky fish that can be used in many recipes. It's best known as a wintertime fish, back when fishermen would put them in ice to keep them fresh until they returned to port.