– 1 pound 80% lean ground beef – 1 small yellow onion, finely diced – 1 ½ teaspoons garlic powder – 1 ½ teaspoons onion powder – 1 teaspoon salt – ¼ teaspoon black pepper – ¼ teaspoon ground mustard seed – 2 tablespoons ketchup – 1 tablespoon mayonnaise – 1 tablespoon sriracha – 8 flour tortilla – 1 cup shredded cheddar cheese, divided – 1 tomato, sliced into ¼ inch-thick round – 1 cup chopped romaine lettuce
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Wipe fat from the cast iron pan using a paper towel.Add 2 tablespoons cheese to a tortilla over medium heat. Cover the cheese with a burger patty and a tablespoon of sauce.
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Sprinkle 2 tablespoons cheese on another tortilla in the griddle. Melt the cheese and toast the tortilla bottom. Put the tortilla, cheese side down, atop the lettuce-topped burger to make a sandwich.
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