Gourmet Dinner, who has already earned his way into the Kentucky Derby field by virtue of his victory in the $1 million Delta Downs Jackpot, worked four furlongs in 47.61 seconds here Wednesday morning in his last serious prep for the Fountain of Youth. With regular rider Sebastian Madrid aboard, Gourmet Dinner posted splits of 12.05 and 24.18, completing his final quarter-mile in 23.43.