Man on the street Doc Willoughby visits Tony Maws at Craigie on Main to learn all about burgers from a pro. Then, test cook Bridget Lancaster demonstrates how to make the Best Grilled Burger at home. Then, test cook Dan Souza explains why you should grind your own burger meat. Next, tasting expert Jack Bishop conducts a tasting of Swiss Cheese. And finally, test cook Dan Souza uncovers the secrets to making Thick-Cut Sweet Potato Fries.