and the best proportion is 1 tablespoon of mayonnaise for every 5-ounce can of (drained, not pressed) tuna fish. Each can is good for roughly one sandwich, so if you're preparing several ...

Line a baking sheet with parchment paper. In a medium bowl, mix drained tuna, chopped fennel, pickled jalapeños, lemon juice, mayonnaise and chopped parsley until well combined. Season with salt ...