Lobster Soup with coconut and corn Recipe

Ingredients

• 1 ½ lb. lobster tails (4–6 oz. each ), cut through the belly (not the meat)
• 8 cups water, divided
• 1 Tbsp. kosher salt
• 3 cups corn kernels, cut from cobs (4–5 cobs; cobs reserved)
• 2 Tbsp. unsalted butter
• 2 cups diced onions
• 2 Tbsp. minced garlic
• 1 Tbsp. grated ginger
• 1 can coconut milk (13.5 oz.)
• Salt, black pepper, and lime juice to taste
• Thinly sliced basil and scallion greens