You can serve these with carrot and celery sticks and a bit of light ranch dressing on the side for dipping.
2 1/2 tablespoons olive oil
2 tablespoons thinly sliced shallots
1 tablespoon Dijon mustard
1/4 teaspoon black pepper
1/8 teaspoon salt
1 (6-ounce) can solid white tuna in water, drained and flaked
1 1/2 tablespoons fresh lemon juice
1 cup cherry tomatoes, quartered
1/3 cup shredded Swiss cheese
2 (6-ounce) pieces French bread, halved lengthwise and toasted
How to Make It
Preheat broiler to high.
Combine first 6 ingredients in a medium bowl, stirring well to coat. Place juice in a small bowl. Peel, seed, and chop avocado. Add avocado to juice; toss. Add avocado mixture and tomatoes to tuna mixture; toss well to combine. Sprinkle cheese evenly over cut sides of bread, and broil for 3 minutes or until cheese is bubbly. Place 1 bread slice, cheese side up, on each of 4 plates, and divide tuna mixture evenly among bread slices.
Sustainable Choice: Solid white tuna is albacore, the most sustainable choice among varieties of tuna.