Tuna Melt

• 1 English hothouse cucumber, sliced 1/8" thick
• 1 habanero chile or 2 jalapenos, halved
• 1 sprig dill
• 1 cup distilled white vinegar
• 1/2 cup sugar
• 1 tablespoon kosher salt
• 1 teaspoon crushed red pepper flakes
• 1/2 teaspoon celery salt
• 1/2 teaspoon mustard seeds
• 1/2 teaspoon ground coriander
• 1/2 teaspoon ground turmeric
• 2 5-ounce cans water-packed solid white tuna, drained
• 1 celery stalk, chopped
• 1/4 English hothouse cucumber, peeled, chopped
• 1/4 small red onion, finely chopped
• 2 tablespoons olive oil
• 1 tablespoon fresh lemon juice
• 1 tablespoon whole grain mustard
• 1 tablespoon finely chopped fresh chives
• 1 tablespoon finely chopped fresh dill
• 1/4 teaspoon celery salt
• 1/2 cup mayonnaise, divided
• Kosher salt
• Freshly ground black pepper
• Hot sauce
• 8 slices challah, toasted
• 4 ounces cheddar, sliced
• Iceberg lettuce leaves

1. Pack cucumber, habanero, and dill into a heatproof glass jar; set aside. Bring vinegar, sugar, kosher salt, red pepper flakes, celery salt, mustard seeds, coriander, turmeric, and 1/2 cup water to a boil in a medium saucepan, stirring to dissolve sugar and salt, then pour into jar. Cover and let cool; chill.
2. Do ahead: Pickles can be made 2 weeks ahead. Keep chilled.
3. Preheat oven to 425u0b0. Mix tuna, celery, cucumber, onion, oil, lemon juice, mustard, chives, dill, celery salt, and 1/4 cup mayonnaise in a medium bowl; season with salt, pepper, and hot sauce.
4. Place bread on a baking sheet and spread remaining mayonnaise over 4 slices; top with tuna salad and cheese. Bake until cheese is melted, about 4 minutes. Top melts with lettuce and pickles and close.

hothouse cucumber, chile, dill, white vinegar, sugar, kosher salt, red pepper, celery salt, mustard seeds, ground coriander, ground turmeric, water, celery stalk, hothouse cucumber, red onion, olive oil, lemon juice, whole grain mustard, fresh chives, fresh dill, celery salt, mayonnaise, kosher salt, freshly ground black pepper, sauce, cheddar

Taken from www.epicurious.com/recipes/food/views/tuna-melt-51245210 (may not work)