Tempura - Alton Brown

Ingredients

• 5 ounces unbleached cake flour
• 5 ounces white rice flour
• 1 1/2 quarts vegetable oil
• 1 large egg, beaten
• 1 1/2 cups cold seltzer water
• 1/2 cup vodka
• 1 (5- to 6-ounce) sweet potato, peeled and cut into 1/8-inch thick slices
• Kosher salt
• 4 ounces fresh green beans, trimmed
• 8 stems flat-leaf parsley
• 8 ounces (31- to 35-count) shrimp, tail-on, peeled, and deveined
• 8 ounces tilapia fillets, cut into 1-inch pieces
• Ice