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Veggie Burgers with Balsamic Onions and Mushrooms
Sweet caramelized onions and earthy sautéed mushrooms transform a standard veggie patty into a standout meal. A quick splash of balsamic vinegar and fresh rosemary brings deep, savory notes to the vegetable topping. You'll layer these rich flavors on a soft pretzel bun with peppery baby arugula, juicy tomato slices, and sharp Dijon mustard. It's a satisfying, meatless sandwich that feels completely upgraded without requiring hours at the stove.
Equipment
- Skillet
Ingredients
- 1 tablespoon olive oil
- ½ cup thinly sliced sweet onion, such as Walla Walla or Vidalia
- 4 mushrooms, sliced (about ⅔ cup)
- ½ teaspoon finely chopped garlic
- 1 teaspoon balsamic vinegar
- 1 teaspoon chopped fresh rosemary or ½ teaspoon dried rosemary leaves, crushed
- ⅛ teaspoon salt
- ⅛ teaspoon pepper
- 2 veggie burgers
- 2 large pretzel buns or hamburger buns, split
- 4 teaspoons Dijon mustard
- ½ cup lightly packed baby arugula
- 2 tomato slices
Instructions
- 1Warm the olive oil in an 8-inch nonstick skillet over medium heat. Add the sliced sweet onion, mushrooms, and chopped garlic. Cook for 8 to 10 minutes, stirring frequently, until the onions turn golden brown. Don't rush this step; letting the onions caramelize builds a deep, sweet flavor base.
- 2Stir the balsamic vinegar, rosemary, salt, and pepper into the vegetables. Cook for 30 seconds until the vinegar evenly coats the onion mixture, then remove the pan from the heat.
- 3Cook the veggie burgers according to the package directions.
- 4Spread the Dijon mustard evenly over the cut sides of the split pretzel buns. Arrange half of the baby arugula on the bottom buns and place the hot veggie burgers on top.
- 5Spoon the caramelized onion and mushroom mixture over the patties. Top with the tomato slices, the remaining arugula, and the top halves of the buns.
Notes
- Texture: Toast the buns before filling. Brush the cut sides with a little olive oil or butter and cook face down in a skillet until golden brown.
- Variation: Substitute beef burgers and melt a slice of Brie cheese on top during the last few minutes of cooking.
Recipe Details
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