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Playing French Onion Burger

Rach's French Onion Burger on a baguette — served with French Oven Gravy Fries — is one of her favorite burgers ever.


  • 2 to 2 1/2 pounds baking potatoes
  • 7 cloves garlic, peeled (4 smashed and 3 minced)
  • 5 to 6 tablespoons EVOO Extra Virgin Olive Oil
  • Salt and freshly ground black pepper
  • 6 tablespoons butter, divided
  • 2 large onions, sliced
  • 1 fresh bay leaf
  • 1 teaspoon ground thyme
  • 1/2 cup dry sherry
  • 2 pounds ground sirloin
  • 3 tablespoons Worcestershire sauce
  • 4 tablespoons flat-leaf parsley, chopped
  • 1 shallot, minced
  • 2 tablespoons flour
  • 2 cups store-bought beef stock
  • 1 tablespoon Dijon mustard
  • 1 baguette, fatter in size, cut on a bias into 1-inch slices (about 8 slices)
  • 1/2 pound gruyere cheese, shredded
  • 1 10-ounce sack of mixed greens
  • 3 tablespoons red wine vinegar


Serves: 4


Preheat oven to 425F. Preheat grill pan over medium-high heat.

Cut the potatoes in half lengthwise then cut each half into 4 to 5 long wedges, depending on how big the potatoes are. Place the wedges and smashed garlic cloves on a cookie sheet, drizzle with about 3 tablespoons of EVOO and toss to coat. Season the potatoes with salt and pepper, and roast for about 20 minutes, until brown and tender. Flip the potatoes and continue to roast for about 10 minutes, until cooked through. If you like them extra crispy, cook them a total of 45 minutes.

While the potatoes are in the oven, place a large, nonstick skillet over medium heat with 4 tablespoons of butter. Once melted, add onions, minced garlic, bay leaf, ground thyme and some salt and pepper. Cook onions for about 10-12 minutes, until caramelized. Add sherry and let the alcohol cook out, about 3-4 minutes. Remove the bay leaf and set the mixture aside to top the burgers.

In a medium bowl, combine the ground sirloin, Worcestershire, parsley, salt and pepper. Divide the mixture into 4 equal portions and form 4 patties, each about an inch thick. Drizzle the patties with EVOO and place them on the preheated grill pan. Cook about 5 minutes per side, until pink in the center.

While the burgers are cooking, place a small sauce pan over medium heat, add the remaining 2 tablespoons of butter. Once the butter is melted, add the shallots and cook for 1-2 minutes. Add the flour to make a roux. Cook the flour-butter mixture for about 3-4 minutes, while stirring constantly, until lightly golden in color. Whisk in the beef stock, a little at a time to avoid lumps. Once all of the stock is added, stir in the Dijon mustard and season with salt and pepper. Turn heat to low and set aside.

For the French baguette, you want large round slices: Hold your serrated knife on a 45-degree angle and slice, keeping your knife on that angle; just like slicing a flank steak or London broil. Drizzle bread slices with EVOO and season with salt and pepper. Place under the broiler for about 30 seconds. Flip to the other side and top four of the slices with the shredded gruyere cheese. Give them another 20 seconds under the broiler to give them a good melt. Keep a close eye on it, because if you're like me, you've burned one too many loaves of bread!

Last, but not least, add the sack of mixed greens to a salad bowl and drizzle with the red wine vinegar and a few tablespoons of EVOO. Season with salt and pepper and toss to coat.

It's burger assembly time! Place a burger on a piece of non-cheesy bread. Top with the caramelized onion mixture and a slice of the cheesy bread. Place a serving of potatoes on the plate and spoon some of the gravy on top. Place a portion of the mixed greens salad on the plate and enjoy!