Chicken Mojo Burger

Ingredients

• 1 cup chopped onion
• 1/2 cup fresh orange juice
• 1/2 cup fresh oregano leaves (about 1/2-ounce package, can sub about 1 tablespoon dried oregano but fresh is best)
• 1/4 cup olive oil
• 8 garlic cloves
• 3 tablespoons fresh lime juice
• 1 tablespoon orange zest
• 2 teaspoons ground cumin
• 1 teaspoon kosher salt
• 1/4 teaspoon black pepper
• 1/4 teaspoon cayenne pepper
• 1 1/2 lbs boneless skinless chicken breasts
• Topping
• 1/4 cup orange marmalade
• 1/4 cup light mayonnaise
• 1 teaspoon lime juice
• 1/2 teaspoon lime zest
• 1/2 teaspoon kosher salt, divided
• 1/4 teaspoon black pepper, divided
• The Rest
• 4 artisan buns (pistolettes, etc.) or 4 other crusty buns (pistolettes, etc.)
• 4 tablespoons butter, softened
• 4 slices provolone cheese