"This dish uses a classic Thai preparation method of protein. It might not sound like much, but it's a very satisfying dish, especially made with shrimp that's shell-on. We eat the shrimp shell and all, as to not miss out on any flavor. It's also a very kid-friendly dinner dish. Serve with lots of rice."
Combine garlic, tapioca flour, fish sauce, soy sauce, sugar, and white pepper in a bowl; add prawns and toss to coat.
Heat 2 tablespoons oil in a heavy skillet over high heat. Add 1/2 of the prawns in single layer; fry until golden brown and crispy, 1 to 2 minutes per side. Repeat with remaining oil and remaining prawns.