Prepare the Corn: Gently remove the corn husks, leaving them attached at the base. Secure the husks by tying them with string, then submerge the ears in water to soak. This helps prevent the husks from burning during the grilling process.
Grill the Corn: Brush each cob generously with melted butter, seasoning lightly with salt and pepper. Place the corn on the grill, turning frequently to ensure an even cook, about 3 to 4 minutes on each side. Use foil under the husks to protect them from burning.
Prepare the Feta Sauce: While the corn grills, pour the cream into a small saucepan and heat over low. Gradually add the feta cheese, stirring continuously until fully melted and combined, forming a smooth, creamy mixture. Be mindful to stir often to prevent sticking.
Assemble the Dish: Once the corn is fully grilled, brush each cob with a layer of mayonnaise. Drizzle the feta sauce over the corn, then finish with a squeeze of fresh lime juice, a sprinkle of zest, and a dusting of chili flakes. Garnish the dish with crispy shallot chips for a final touch of texture.