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Stack of sliced tuna melt stuffed onions

Keto Tuna Melt

Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes
Servings 9 Stuffed Onions
Calories 247kcal


  • 1 Large Yellow Onion
  • 7 1/2 Ounces Tuna* drained and flaked
  • 6 Tablespoons Mayonnaise
  • 2 Tablespoons Parmesan grated
  • 1/4 Cup Celery large, finely chopped
  • 6 Tablespoons Dill Pickles finely chopped
  • 1 Tablespoon Lemon Juice
  • 1/2 Teaspoon Curry Powder
  • 1 1/2 Teaspoon Dill chopped
  • 1 Teaspoon Garlic Powder
  • 3 Cups Sharp Cheddar Cheese shredded

Serving Recommendations:


  • Preheat oven to 400 F and line a baking sheet with parchment paper.
  • Peel and slice large yellow onion (1) into 3/4" rings.
  • Grab 2 outer onion rings at a time, and place them on the prepared baking sheet -- you should be able to get at least 9 sets of rings before they start to get too small.
  • Combine tuna (7 1/2 Ounces), mayonnaise (6 tablespoons), grated parmesan (2 tablespoons), finely chopped celery (1/4 cup), finely chopped pickles (6 tablespoons), lemon juice (1 tablespoon), curry powder (1/2 tablespoon), chopped dill (1 1/2 teaspoon), and garlic powder (1 teaspoon) together in a large bowl.
  • Scoop the tuna salad into the center of each onion ring and press down to flatten out the tops.
  • Evenly distribute half the cheese over the onion rings.
  • Bake in preheated oven for 10 minutes.
  • Remove baked melts from the oven and allow them to cool for about 5 minutes. Then flip them over, and sprinkle the remaining cheese on top. Return to the oven for another 10-12 minutes. You'll know they're done once the tops are golden brown.
  • Allow them to cool slightly on the baking sheet (this will give the cheese time to harden). Enjoy!


  • Pickles - Many pickles contain added sugar, check the labels before purchasing a product. We love Vlasic.
  • Nutritional information is for 1 stuffed onion if you make 9 using this recipe:


Calories: 247kcal | Total Carbohydrates: 2g | Protein: 15g | Fat: 20g | Sodium: 458mg | Fiber: 1g | Sugar: 1g | Net Carbs: 1g

Delicious recipe from Lindsey Hyland // www.thelittlepine.com