Tuna, Avocado, and Pickled Onion Sandwich

Tuna, Avocado, and Pickled Onion Sandwich

From Cooking Light

This sandwich is all about healthy fats, with omega-3 fatty acids in the tuna and monounsaturated fat in the avocado. The first boosts brain function; the second is great for heart health. Tuna and avocado also happen to taste delicious together, along with pickled onion, roasted almonds, and briny, pea-green Castelvetrano olives. You’ll want a sturdy loaf of sourdough to support the filling; be sure to buy from the bakery section of the supermarket.

Active Time

10 Mins

Total Time

15 Mins


Serves 4 (serving size: 1 sandwich)


  • 3/4 cup thinly sliced red onion
  • 2/3 cup apple cider vinegar
  • 1/4 cup water
  • 1 teaspoon sugar
  • 2 ripe peeled avocados, sliced
  • 4 (1 1/2-oz.) whole-wheat sourdough bread slices, toasted
  • 1/2 teaspoon kosher salt, divided
  • 1/2 teaspoon black pepper, divided
  • 1 (4-oz.) can albacore tuna in water, drained
  • 1/2 cup fresh flat-leaf parsley leaves
  • 2 tablespoons chopped roasted unsalted almonds
  • 2 tablespoons chopped pitted Castelvetrano olives


How to Make It

Step 1

Bring onion, vinegar, 1/4 cup water, and sugar to a boil in a small saucepan over medium-high. Remove pan from heat; let stand 5 minutes. Drain.

Step 2

Divide the avocado slices evenly among bread slices; mash with a fork. Sprinkle with 1/4 teaspoon salt and 1/4 teaspoon pepper. Top evenly with tuna, onions, parsley, almonds, and olives. Sprinkle with remaining 1/4 teaspoon salt and remaining 1/4 teaspoon pepper. 
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BestLife Insider - Health, Lifestyle, Travel and More ...: Tuna, Avocado, and Pickled Onion Sandwich
Tuna, Avocado, and Pickled Onion Sandwich
BestLife Insider - Health, Lifestyle, Travel and More ...
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