Oklahoma Onion Smash Burger but it's Gluten Free

"Are you sure this is gluten free?" Nikki when I made this for her Subscribe for more! Recipe and all the details are on the website: https://glutenfreeandamovie.com/2024/08/11... Here's what you'll need: 1/2 pound ground beef (I marinate mine in liquid aminios) 1 gluten free bun (I prefer Canyon's Bakehouse) 1/2 onion (Any flavor, yellow or Vidalia will be sweeter) 2 slices of American cheese 2 tbsp unsalted butter Salt Pepper Extra toppings (I like ketchup, mustard, and pickles.) Electric Griddle Mandolin or V-Slicer highly recommended