Indulge in the savory delight of French Dip Sandwiches, a classic comfort food that brings together the rich flavors of mushrooms and onions, simmered to perfection. This vegan twist on a traditional favorite is sure to satisfy your taste buds while offering a hearty and wholesome meal.
While most of the ingredients for this recipe are common, you might need to pay special attention to vegan sandwich rolls. These can be found in the bakery section or the specialty foods aisle of your supermarket. Ensure they are labeled vegan to avoid any animal-derived ingredients.

Ingredients For French Dip Sandwiches Recipe
Mushrooms: Sliced mushrooms add a rich, umami flavor and a meaty texture to the sandwich.
Onions: Sliced onions provide a sweet and savory base for the filling.
Olive oil: Used for sautéing the mushrooms and onions, adding a smooth, rich flavor.
Vegetable broth: This forms the base of the dipping broth, infusing the sandwich with deep, savory notes.
Soy sauce: Adds a touch of saltiness and enhances the umami flavor of the broth.
Vegan sandwich rolls: These rolls are the vessel for the delicious mushroom and onion mixture, perfect for dipping into the broth.
Technique Tip for This Recipe
When sautéing the mushrooms and onions, make sure to cook them until they are deeply caramelized. This will enhance their natural sweetness and add a rich, umami flavor to your French dip sandwiches. Use a wide skillet to ensure even cooking and avoid overcrowding, which can cause the vegetables to steam rather than brown.
Suggested Side Dishes
Alternative Ingredients
mushrooms - Substitute with eggplant slices: Eggplant has a meaty texture similar to mushrooms and absorbs flavors well.
onions - Substitute with leeks: Leeks have a mild, sweet flavor that can complement the other ingredients in a similar way to onions.
olive oil - Substitute with avocado oil: Avocado oil has a high smoke point and a neutral flavor, making it a good alternative for sautéing.
vegetable broth - Substitute with mushroom broth: Mushroom broth adds a deeper umami flavor, enhancing the overall taste of the dish.
soy sauce - Substitute with tamari: Tamari is a gluten-free alternative to soy sauce with a similar savory flavor.
vegan sandwich rolls - Substitute with gluten-free rolls: Gluten-free rolls cater to those with gluten sensitivities while still providing a similar texture and taste.
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How to Store / Freeze This Recipe
Allow the mushroom and onion mixture to cool completely before storing. This helps prevent condensation, which can make the mixture soggy.
Transfer the cooled mixture into an airtight container. For best results, use a container that fits the mixture snugly to minimize air exposure.
Store the vegetable broth separately in a sealed container. This keeps the broth fresh and prevents it from soaking into the sandwich rolls prematurely.
Place the containers in the refrigerator if you plan to consume the sandwiches within 3-4 days. The flavors will meld beautifully, making for an even more delicious meal.
For longer storage, consider freezing the components. Place the mushroom and onion mixture in a freezer-safe container or a heavy-duty freezer bag. Squeeze out as much air as possible to prevent freezer burn.
Pour the vegetable broth into a separate freezer-safe container, leaving a bit of space at the top for expansion. Label both containers with the date to keep track of freshness.
When ready to enjoy, thaw the mushroom and onion mixture and the broth in the refrigerator overnight. This gradual thawing helps maintain the texture and flavor.
Reheat the mushroom and onion mixture in a skillet over medium heat until warmed through. Simultaneously, warm the vegetable broth in a saucepan.
Preheat the oven to 350°F (175°C) and warm the sandwich rolls for about 5 minutes. Assemble the sandwiches with the reheated mixture and serve with the warm broth for dipping.
If you prefer a quicker reheating method, you can microwave the mushroom and onion mixture and the broth in microwave-safe containers. Heat in short intervals, stirring occasionally, until thoroughly warmed.
For an added touch, you can toast the sandwich rolls on a skillet with a bit of olive oil for a crispy exterior before assembling your sandwiches.
How to Reheat Leftovers
Preheat your oven to 350°F (175°C). Wrap the sandwich rolls in aluminum foil to prevent them from drying out. Place them in the oven for about 10 minutes or until they are warmed through.
For a quicker method, use a microwave. Place the sandwich rolls on a microwave-safe plate and cover them with a damp paper towel. Microwave on medium power for 30-45 seconds, checking to ensure they are heated evenly.
To reheat the mushroom and onion mixture, pour it into a skillet and heat over medium heat. Stir occasionally until it is warmed through, which should take about 5-7 minutes.
Alternatively, you can reheat the mushroom and onion mixture in the microwave. Place it in a microwave-safe bowl, cover it with a microwave-safe lid or plastic wrap, and heat on medium power for 2-3 minutes, stirring halfway through.
For the broth, pour it into a small saucepan and heat over medium heat until it begins to simmer. This should take about 5 minutes. If you prefer, you can also microwave the broth in a microwave-safe bowl for 1-2 minutes on high power.
Once everything is reheated, assemble your French Dip Sandwiches by placing the warmed mushroom and onion mixture inside the sandwich rolls. Serve immediately with the hot broth for dipping.
Best Tools for This Recipe
Skillet: Used to cook the mushrooms and onions until they are softened.
Olive oil: Utilized in the skillet to sauté the vegetables.
Knife: Essential for slicing the mushrooms and onions.
Cutting board: Provides a safe surface for slicing the vegetables.
Measuring cups: Ensures accurate measurement of mushrooms, onions, and vegetable broth.
Measuring spoons: Used to measure the olive oil and soy sauce precisely.
Stirring spoon: Helps in stirring the mushrooms and onions while they cook.
Oven: Preheats to warm the sandwich rolls.
Baking sheet: Used to place the sandwich rolls in the oven.
Tongs: Handy for handling the sandwich rolls when they come out of the oven.
Serving bowls: Used to serve the broth for dipping.
Sandwich rolls: The base for assembling the French dip sandwiches.
How to Save Time on Making This Recipe
Pre-slice vegetables: Slice mushrooms and onions ahead of time and store them in the fridge.
Use pre-made broth: Opt for store-bought vegetable broth to save time on preparation.
Quick warm rolls: Warm sandwich rolls in the microwave for 30 seconds instead of the oven.
Batch cooking: Double the recipe and store extra mushroom and onion mixture for future meals.
Efficient simmering: Use a lid while simmering the broth mixture to speed up the process.

French Dip Sandwiches Recipe
Ingredients
Main Ingredients
- 1 cup Mushrooms, sliced
- 1 cup Onions, sliced
- 2 tablespoon Olive oil
- 2 cups Vegetable broth
- 1 teaspoon Soy sauce
- 4 pieces Vegan sandwich rolls
Instructions
- 1. Heat olive oil in a skillet over medium heat.
- 2. Add sliced mushrooms and onions, cook until softened.
- 3. Add vegetable broth and soy sauce, simmer for 10 minutes.
- 4. Preheat oven to 350°F (175°C).
- 5. Place sandwich rolls in the oven for 5 minutes to warm.
- 6. Assemble sandwiches with mushroom and onion mixture, serve with broth for dipping.
Nutritional Value
Keywords
Suggested Appetizers and Desserts for This Recipe
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