Ina freezes freshly ground beef patties 15 minutes before cooking them to ensure her burgers are crispy on the outside and medium rare on the inside!Subscribe to #discoveryplus to stream more of #BarefootContessa: http://discoverypl.us/2NeKVgdGet the recipe ▶ https://foodtv.com/320XC5CSubscribe to Food Network ▶ http://foodtv.com/YouTubeIna throws open the doors of her Hamptons home for delicious food, dazzling entertaining ideas and good fun on Barefoot Contessa.Welcome to Food Network, where learning to cook is as simple as clicking play! Grab your apron and get ready to get cookin' with some of the best chefs around the world. We'll give you a behind-the-scenes look at our best shows, take you inside our favorite restaurant and be your resource in the kitchen to make sure every meal is a 10/10!Smashed Hamburgers with Caramelized OnionsRECIPE COURTESY OF INA GARTENLevel: EasyTotal: 55 min (includes freezing time)Active: 40 minYield: 4 servingsIngredientsCanola or grapeseed oil4 cups (1/4-inch) sliced red onions (2 medium)1 teaspoon sugar1 tablespoon good red wine vinegar1 1/2 teaspoons dry mustard powder, such as Colman’sKosher salt and freshly ground black pepper1 1/4 pounds ground beef with 20% fat1 1/4 cups grated Gruyère cheese (4 ounces)4 sandwich potato rolls, such as Martin’sKetchup, for servingDirectionsHeat 2 tablespoons oil in a large (12-inch) sauté pan over medium heat, add the onions, and cook for 8 to 10 minutes, stirring occasionally, until the onions are tender and starting to brown. Add the sugar, reduce the heat to low, and cook for 10 to 15 minutes, stirring occasionally, until the onions are browned and caramelized. Add the vinegar and cook for 30 seconds to deglaze the pan.Meanwhile, combine the dry mustard, 1 1/2 teaspoons salt, and 1/2 teaspoon pepper in a small bowl. Place the ground beef in a medium bowl and sprinkle on the mustard mixture. With your fingers, lightly work the mustard into the beef and shape into four 1-inch-thick patties. Place them on a plate and freeze for exactly 15 minutes.Heat a large (12-inch) cast-iron skillet over medium-high heat and add 1 1/2 tablespoons oil. From the freezer, place the burgers directly in the hot skillet. With a large metal spatula, firmly press each burger into the pan. Cook the burgers for 2 1/2 to 3 minutes, without moving them, so the bottoms get browned and crusty. Flip the burgers, then spoon on the onions and sprinkle the Gruyère on top. Place a lid on the skillet and cook the burgers for 1 1/2 to 2 minutes, until the cheese is melted and the burgers are medium-rare inside. Place one burger on each roll and serve hot with ketchup on the side.Subscribe to our channel to fill up on the latest must-eat recipes, brilliant kitchen hacks and content from your favorite Food Network shows.▶ FOOD NETWORK KITCHEN APP: http://foodtv.com/FNKApp▶ WEBSITE: https://www.foodnetwork.com▶ FULL EPISODES: https://watch.foodnetwork.com▶ FACEBOOK: https://www.facebook.com/FoodNetwork▶ INSTAGRAM: https://www.instagram.com/FoodNetwork▶ TWITTER: https://twitter.com/FoodNetwork#InaGarten #BarefootContessa #FoodNetwork #SmashedHamburgersIna Garten's Smashed Hamburgers with Caramelized Onions | Barefoot Contessa | Food Networkhttps://www.youtube.com/watch?v=y7FjxQUJopA