Grilled Lobster Sandwich with Charred Corn and Avocado Salsa

INGREDIENTS

• 1/4 cup chopped fresh cilantro
• 1/2 small red onion, finely diced
• Salt and freshly ground pepper
• 1/2 cup mayonnaise, optional
• 1 serrano chile, grilled, unpeeled and thinly sliced
• Canola oil
• 1 to 2 limes
• 3 ripe avocados, peeled, pitted and diced
• Charred Corn and Avocado Salsa, recipe follows
• 8 ears corn
• 1/2 cup creme fraiche
• Salt and freshly ground black pepper
• 4 soft, sesame-topped hamburger buns, toasted
• 1 tablespoon kosher salt
• 4 par-cooked lobster tails
• Few dashes hot sauce, such as Tabasco
• 1 red onion, peeled and sliced into 1/4-inch-thick slices
• Juice of 2 limes