Portobello French Dip with Horseradish Aioli

This is the recipe for Portobello mushroom French dipping sandwiches (with horseradish and garlic sauce). Here are the details:

I. Overview

Ingredients: Roasted Portobello mushroom sticks, golden caramelized onions, melted Provolone cheese, and horseradish and garlic sauce—all piled on a warm, crispy bread roll.

II. Ingredient List

Roasted Mushrooms:

4 Portobello mushroom caps, thinly sliced

2-3 tablespoons olive oil

1-2 teaspoons Montreal steak seasoning (or a pinch of salt and pepper)

Caramelized Onions and Au Jus:

1 large onion, thinly sliced

1 tablespoon Worcestershire sauce (omit for vegetarians/vegans)

2 cups beef or vegetable broth

Seasoned with salt, pepper, and a pinch of sugar

Ingredients for Horseradish Garlic Sauce:

1 clove garlic, minced

Essential Ingredients for French Dipping Sandwiches:

4 crispy sourdough rolls, or baguettes cut into quarters

III. Instructions

Roasted Mushrooms:

Preheat oven to 450 degrees Fahrenheit.

Mix the sliced ​​mushrooms with the oil and seasoning.

Roast for 20-30 minutes.

Caramelized Onions:

Melt butter in a large skillet over medium heat.

Add the onions and sauté until softened, then reduce heat and sauté for about 20 minutes, stirring occasionally, until the onions are a deep golden brown.

To make the Au Jus:

Add the wine to a saucepan and let it sizzle and evaporate.

Add the Worcestershire sauce and soy sauce.

Add the stock and cook until slightly reduced.

Remove the onions with tongs and set aside.

Season the gravy to taste.

To bake the sandwiches:

Brush the bread with butter if desired.

Top the bread with mushrooms and cheese.

Place in the same baking dish and bake for about 5 minutes (enough to heat the bread and melt the cheese).

To serve:

Top the sandwiches with the caramelized onions.

Add a spoonful of horseradish garlic sauce to each sandwich.

Serve with Au Jus.

IV. Frequently Asked Questions

What can be used as a substitute for Worcestershire sauce?

Vegan Worcestershire sauce or soy sauce can be used instead.

What can be used as a substitute for white wine?

You can add a little water instead.

How to make a gluten-free version?

It's recommended to use gluten-free Worcestershire sauce, soy sauce, or coconut amino soy sauce instead of regular soy sauce, and use gluten-free baguettes or rolls.

This sandwich is a great vegetarian alternative for meat lovers, both delicious and comforting.