When chef Mario Batali stops by Rachael's kitchen, he comes bearing gifts and exciting news! First, he shares his recipe for Grilled Portobellos with Rucola and Parmigiano and gives Rachael's audience a copy of his new book, Italian Grilling.

Finally, Mario announces a new competition -- Mario's Ultimate Grilling Challenge. "You're going to submit up to a 3-minute video demonstration of your favorite grilling recipe. The final grand prize is tailgating at the Texas Motor Speedway with me and Rach at a NASCAR race in November!" Click here for more details.