Hot Chickpea Sandwiches with Radicchio Ranch Slaw

Name: Hot Chickpea Sandwiches with Radicchio Ranch Slaw
Ingredients: 2 1/3 cups chickpea flour; Kosher salt and freshly ground black pepper; 2 tablespoons fresh flat-leaf parsley leaves, chopped; Canola oil, for greasing and frying; 1/2 cup mayonnaise; 1/2 cup sour cream; 3 tablespoons thinly chopped fresh chives; 1 1/2 teaspoon onion powder; 1/2 teaspoon garlic powder; 1 clove garlic, grated; 1 lemon, zested and juiced; One 14-ounce bag slaw mix; 1 small head radicchio, cored and julienned; 2 teaspoons light brown sugar; 1 teaspoon cayenne pepper; 1 teaspoon dry mustard; 1 teaspoon smoked paprika; 1 cup panko; 2 large eggs, beaten; 6 sandwich-size potato buns, preferably Martin’s; 6 slices sharp provolone cheese