Dirty Burgertini with Martini Aoli and Cocktail Olive and Onion Tapenade

Ingredients

• 1 cup mayonnaise
• 2 tablespoons dried, crushed juniper berries
• 1 teaspoon lime zest
• 1 tablespoon Bombay Sapphire Gin
• 1/2 teaspoon black pepper
• 3/4 cup drained green cocktail olives with pimento
• 1/2 cup drained cocktail onions
• 1 teaspoon fresh basil
• 3 tablespoons extra virgin olive oil
• 2 pounds freshly ground chuck 80/20
• 3 tablespoons Worcestershire sauce
• 1/2 teaspoon onion powder
• 1/4 teaspoon kosher salt
• 1/4 teaspoon freshly ground black pepper
• 5 tablespoons Vegetable oil, for brushing on the grill rack
• 6 medium leaves romaine lettuce
• 6 buns Ciabatta Bread buns, split