Description
These Vegetarian French Dip Sandwiches feature savory sautéed portobello mushrooms and onions simmered in a rich vegetable broth au jus, served on toasted French or Hoagie rolls with melted provolone cheese. Perfect for a satisfying meat-free twist on the classic French dip, this recipe is quick to prepare and delivers comforting flavors in just 35 minutes.
Ingredients
Vegetables
- 1 yellow onion
- 3 portobello mushroom caps (about ½ lb.)
Seasonings & Broth
- 2 Tbsp butter
- 1/8 tsp salt
- 1/8 tsp freshly cracked black pepper
- 1/4 tsp dried thyme
- 1/4 tsp dried oregano
- 2 cups vegetable broth
- 1 Tbsp soy sauce
- 1/2 Tbsp brown sugar
- 1/8 tsp garlic powder
Bread & Cheese
- 4 6-inch French or Hoagie rolls
- 4 slices provolone cheese
Instructions
- Prepare Vegetables: Slice the yellow onion into thin strips. Rinse the portobello mushroom caps thoroughly and slice each cap in half, then crosswise into 1/4-inch thick strips.
- Sauté Onions: In a deep skillet, melt the butter over medium heat. Add the sliced onions and sauté for a few minutes until they begin to soften.
- Cook Mushrooms: Add the sliced mushrooms to the skillet along with salt, black pepper, dried thyme, and dried oregano. Continue sautéing until the mushrooms release their moisture and the liquid evaporates, about 10 minutes, allowing browned bits to form on the bottom of the skillet.
- Simmer Au Jus: Pour in the vegetable broth, soy sauce, brown sugar, and garlic powder. Stir well to dissolve the browned bits from the skillet’s bottom. Bring the mixture to a simmer, then reduce heat to low and let it simmer for about 5 minutes while preparing the bread.
- Toast Rolls: Preheat the oven broiler. Open the rolls and place them on a baking sheet with the open sides facing up. Broil on the middle rack, watching closely, until edges slightly brown, about 5 minutes.
- Assemble Sandwiches: Using a slotted spoon or tongs, remove the mushrooms and onions from the au jus. Divide them evenly among the toasted rolls. Top each with a slice of provolone cheese.
- Melt Cheese: Return the sandwiches to the oven and broil for a few more minutes until the cheese is melted and bubbly. Close the sandwiches and serve immediately with the remaining au jus for dipping.
Notes
- Make sure to watch the rolls carefully while broiling to prevent burning.
- Use a slotted spoon to drain mushrooms well so the sandwiches don’t get soggy.
- For a vegan option, substitute butter with a plant-based alternative and use vegan cheese slices.
- You can add fresh herbs like parsley for garnish if desired.
- The au jus can be reheated gently if made in advance.
- Prep Time: 10 minutes
- Cook Time: 25 minutes
- Category: Sandwich
- Method: Stovetop
- Cuisine: American
