Red Robin The Banzai Burger

"Menu Description: "Marinated in teriyaki and topped with grilled pineapple, Cheddar cheese, lettuce, tomatoes, and mayo. Dude, you'll be like, ready to ride the pipeline on Oahus North Shore after you chomp on this!" Here's customer choice number one from Red Robin's huge burger menu. According to Red Robin servers, the beef they use for all their burgers is ground from Angus flank steak. That meat makes for a great burger to be sure, but it's tough to find in the market unless you grind your own. So if you're not up for some good old-fashioned meat-grinding fun, just pick up ground chuck for this recipe. If you can't find chuck, sirloin will have to do. Just make sure the fat content is at least 15 percent, since low-fat ground beef makes burgers that are just too dry and short on flavor. I tested a half-dozen popular teriyaki glazes in the stores and nothing comes close to the stuff they use at the restaurant, so I've included a recipe here to make your own. Be sure to watch your marinated meat and pineapple slices closely on the grill since the sugar in the teriyaki marinade could burn over the open flame. If you're grilling outside, keep the lid open. And don't hit the La-Z-Boy until this puppy's done...."