Ingredients

8 3/4-inch-thick slices baguette, cut on the diagonal

1 tablespoon olive oil

coarse salt and ground pepper

1/4 cup fresh lemon juice, from 2 lemons

4 tablespoons Dijon mustard

2 cans (6 ounces each) tuna in olive oil, drained, reserving 1 tablespoon oil

1 can (15 ounces) cannellini beans, rinsed and drained

1/2 cup fresh flat-leaf parsley, chopped

1 shallot, finely chopped

2 celery stalks, thinly sliced crosswise

Preparation

Preheat oven to 450 degrees. Place slices on a baking sheet. Brush top side with olive oil; sprinkle with salt and pepper. Bake until golden, 4 to 6 minutes. Set aside.

In a large bowl, whisk together lemon juice, 2 tablespoons mustard, and reserved tuna oil; season with salt and pepper. Add tuna, beans, parsley, shallot, and celery; toss to combine.

Spread bread with remaining 2 tablespoons mustard. Top with tuna salad, and serve.