Pour enough oil in a large Dutch oven to fill about a third of the way. Heat over medium heat until a deep-frying thermometer inserted in the oil reaches 350 degrees F. Line a plate with paper towels.
Combine the flour, cornmeal, sugar, baking powder and 3/4 teaspoon salt in a large bowl. Stir in the buttermilk, okra, Cheddar, corn, scallions and egg. Working in batches, carefully drop heaping tablespoons of the batter into the oil. Fry, turning, until golden, about 5 minutes. Drain on the prepared plate. Season with salt. Serve with honey mustard.
Courtesy of Food Network Magazine, Photograph by Charles Masters