Fritto Misto di Mare (Fried Mixed Seafood) Recipe

Ingredients (9)

• 1 pound (455g) medium to large head-on shrimp or 12 ounces (340g) medium shell-on shrimp (see note)
• 2 quarts (1.9L) vegetable oil, for frying
• 2 cups (11 ounces; 310g) fine semolina flour (semola rimacinata) or 2 cups (9 ounces) all-purpose flour (see note)
• 1/2 cup (70g) cornstarch
• 1/2 teaspoon baking powder
• Kosher salt
• 1 pound (455g) cleaned squid, tubes sliced crosswise into 3/4-inch-thick rings, tentacles left whole
• 12 ounces (340g) smelt, cleaned (see note)
• Lemon wedges, for serving