Description
Portobello French Dip with Horseradish Aioli is a savory vegetarian twist on the classic sandwich, featuring juicy sautéed mushrooms served on crusty bread with a zesty aioli and flavorful au jus for dipping.
Ingredients
Units
Scale
- 4 large portobello mushroom caps, cleaned and sliced
- 1 tablespoon olive oil
- 1 tablespoon soy sauce
- 1 tablespoon balsamic vinegar
- 1 teaspoon garlic powder
- 1/2 teaspoon black pepper
- 4 crusty sandwich rolls or hoagie buns
- 4 slices provolone or Swiss cheese
- 1 tablespoon butter
- 1 small onion, thinly sliced
- Horseradish Aioli:
- 1/2 cup mayonnaise
- 1 tablespoon prepared horseradish
- 1 teaspoon lemon juice
- 1 small garlic clove, minced
- Salt and pepper, to taste
- Vegetarian Au Jus:
- 2 cups vegetable broth
- 1 tablespoon soy sauce
- 1 teaspoon Worcestershire sauce (vegetarian)
- 1/2 teaspoon onion powder
- 1/2 teaspoon garlic powder
Instructions
- In a skillet, heat olive oil over medium heat. Add sliced mushrooms, soy sauce, balsamic vinegar, garlic powder, and black pepper. Cook until mushrooms are tender and browned, about 8–10 minutes.
- In a separate pan, melt butter and sauté onions until caramelized, about 10 minutes. Set aside.
- In a small bowl, whisk together all aioli ingredients. Refrigerate until ready to use.
- For the au jus, combine vegetable broth, soy sauce, vegetarian Worcestershire, onion powder, and garlic powder in a small saucepan. Bring to a simmer and let it warm while assembling sandwiches.
- Preheat broiler. Slice rolls and toast lightly if desired. Layer each roll with mushrooms, caramelized onions, and a slice of cheese. Broil just until cheese melts.
- Spread horseradish aioli on the top half of each roll, close the sandwich, and serve with warm au jus for dipping.
Notes
- Swap cheese for a dairy-free version to make it vegan.
- Double the aioli and use as a dipping sauce or spread on other sandwiches.
- Use baby bella mushrooms for a milder flavor if preferred.
Nutrition
- Serving Size: 1 sandwich
- Calories: 430
- Sugar: 6g
- Sodium: 780mg
- Fat: 24g
- Saturated Fat: 7g
- Unsaturated Fat: 15g
- Trans Fat: 0g
- Carbohydrates: 38g
- Fiber: 3g
- Protein: 12g
- Cholesterol: 25mg