Use the June Cook-Program for Jumbo Prawns to roast prawns or shrimp for any recipe that calls for cooked ones, or to enjoy as an appetizer with cocktail sauce and lemon wedges. Even though prawns and shrimp are not the same, your June will cook them to perfection no matter what you choose. For best results use Jumbo or Extra Jumbo. Both are sold according to the number in a pound. Jumbo, notated as 21/25, contains 21-25 pieces per pound and Extra Jumbo, notated as 16/20, contains 16-20 pieces per pound.