Preheat the oven to 375f.Mix the ingredients together with your hands and form meat mixture into 4 even balls.
In a large bowl, combine all of the burger ingredients until combined.Heat for 45 seconds to 1 min.Spread glaze on buns, top with burger.
Place each burger on a bun and top with the sauce.Soak the onion rings in a bowl of cold water.
Descubre los restaurantes con ofertas.Mix the patty ingredients together in a large bowl.Preheat the oven to 400°f.
Form mixture into 4 equal sized patties, place into a rimmed baking sheet.Reserve 2 tablespoons of the ketchup for the patty toppings.
Heat a large cast iron skillet over medium heat then add a little oil to it.Toast buns on the griddle top.Ketchup, parsley, egg, mustard, onion powder, 3/4 teaspoon salt and 1/4 teaspoon pepper.
Meanwhile, whisk mayonnaise, vinegar, 1/4 teaspoon pepper, and remaining 1/4 cup ketchup together in bowl.Brush 1 tablespoon of ketchup onto each patty with a basting brush and cook for another 5 minutes.
Serve on buns with sauce.Combine the beef, 1 teaspoon salt and pepper;Let the burgers rest for a few minutes before serving to allow the juices to settle.