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French Onion Beef Sloppy Joes

A close-up of a delicious French Onion Beef Sloppy Joe sandwich on a plate, with melted cheese.

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Quick and flavorful French onion beef sloppy joes, perfect for a family weeknight dinner. This easy skillet recipe features caramelized onions and melted cheese on toasted buns.

Ingredients

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  • 1 tablespoon olive oil
  • 1 pound ground beef
  • 1 large yellow onion, thinly sliced
  • 2 cloves garlic, minced
  • 1 teaspoon Worcestershire sauce
  • 1 teaspoon dried thyme
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1/4 cup beef broth
  • 1 tablespoon Dijon mustard
  • 1 tablespoon ketchup
  • 4 hamburger buns
  • 4 slices provolone cheese

Instructions

  1. Heat olive oil in a large skillet over medium-high heat. Add ground beef and cook, breaking it up with a spoon, until browned. Drain off any excess grease.
  2. Add the sliced onion to the skillet with the beef. Cook, stirring occasionally, until the onions are softened and beginning to caramelize, about 8-10 minutes.
  3. Stir in the minced garlic, Worcestershire sauce, thyme, salt, and pepper. Cook for 1 minute more until fragrant.
  4. Pour in the beef broth, Dijon mustard, and ketchup. Stir to combine and bring to a simmer. Reduce heat to low and cook for 5 minutes, allowing the sauce to thicken slightly.
  5. While the sloppy joe mixture simmers, toast the hamburger buns.
  6. Top each toasted bun with the French onion beef mixture. Place a slice of provolone cheese on top of the beef.
  7. Cover the skillet with a lid or foil and let it sit for 1-2 minutes, or until the cheese is melted and gooey.
  8. Serve immediately.

Notes

  • For deeper flavor, you can caramelize the onions separately before adding them to the skillet with the beef.
  • You can add a splash of red wine when deglazing for an extra layer of flavor.
  • If you don’t have provolone, Swiss or mozzarella cheese also work well.

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