Raclette Burger

Ingredients

• 1/2 cup mayonnaise
• 1 tablespoon fresh squeezed lemon juice
• 1 teaspoon prepared horseradish
• 1 garlic clove, minced
• 1/8 teaspoon kosher salt
• 1/8 teaspoon ground black pepper
• 1 medium shallot, sliced into thin half moons
• 3/4 cup white wine vinegar (rice vinegar may be substituted)
• 3/4 teaspoon granulated sugar
• 1/2 teaspoon kosher salt
• 6 slices bacon
• 4(6-ounce) ground chuck patties
• Kosher salt
• Ground black pepper
• 10 ounces Raclette Cheese
• 4 hamburger buns, toasted
• Optional toppings: lettuce and tomato