Gizzards are cheap, humble, and completely underrated on the grill. Parboil them first — with smashed lemongrass and ginger in the water — and the tough muscle turns tender enough to take char without going to leather. From there it's a Thai street-cart move: a marinade of Madras curry, fish sauce, and a little sweetened condensed milk that caramelizes hard over direct heat.
These come off the coals smoky and deeply savory, with just enough sweetness to catch the fire. Squeeze lime over the top, scatter with peanuts, chili, and herbs, and eat them straight off the skewer.
Why this works
The parboil isn't optional — it tenderizes a hard-working muscle that would otherwise stay chewy, and it seasons from the inside with lemongrass and ginger. The condensed milk isn't only for sweetness; its sugars and dairy solids are what give you fast, blistered caramelization over a hot fire. Keep the coals aggressive and the skewers moving, and you'll char the outside before the inside dries out.