Step 1

Mix together coriander, paprika, oregano, thyme, 1 teaspoon salt, and 1/2 teaspoon pepper. In a large bowl, whisk together rice flour, semolina, and all but 1 teaspoon of spice mixture. Add okra; toss to fully coat. Shake excess flour mixture from okra back into bowl, and transfer okra to a plate.

Step 2

Add enough water to flour mixture in bowl to create a batter about the thickness of honey (you should have about 3/4 cup; you may need to add more water as you go along, as rice flour thickens quickly).

Step 3

Pour enough oil into a medium heavy pot to come about 1 inch up sides (about 4 cups). Clip a deep-fry thermometer to pot and heat oil over medium to 350°F. Working with a handful at a time, add okra to batter, turning to coat. Using tongs, lift out of batter and carefully add to oil.

Step 4

Cook, turning once, until golden brown, 1 1/2 to 2 minutes. Transfer to a wire rack set inside a rimmed baking sheet; sprinkle immediately with salt. Place in a 200°F oven to keep warm. When all okra is cooked, sprinkle with some of remaining spice mixture and more paprika. Serve with lime wedges.