Roasted Mushroom Sandwich With Horseradish Aioli

This Roasted Mushroom Sandwich with Horseradish Aioli is a hearty and flavorful vegetarian option that’s perfect for lunch or a light dinner. The earthy, umami-rich mushrooms are roasted to perfection, bringing out their deep, savory flavors. Paired with a zesty horseradish aioli, the sandwich offers a delightful balance of spice and creaminess that complements the mushrooms wonderfully. Topped with fresh arugula and served on crusty bread, this sandwich is sure to satisfy even the most dedicated meat lovers.

Ingredients:

• For the mushrooms:
  • 2 cups of assorted mushrooms (e.g., cremini, shiitake, portobello), sliced
  • 2 tablespoons olive oil
  • 1 teaspoon balsamic vinegar
  • 2 cloves garlic, minced
  • 1 teaspoon fresh thyme, chopped
  • Salt and pepper to taste
• For the horseradish aioli:
  • 1/2 cup mayonnaise
  • 2 tablespoons prepared horseradish
  • 1 teaspoon lemon juice
  • 1 clove garlic, minced
  • Salt and pepper to taste
• For the sandwich:
  • 4 slices of crusty bread (such as sourdough or ciabatta)
  • 1 cup fresh arugula
  • 1 tablespoon olive oil (for toasting the bread)
  • Optional: cheese (such as Swiss or Gruyère)

Instructions:

1. Roast the Mushrooms:
   1. Preheat your oven to 400°F (200°C).
   2. In a large bowl, toss the sliced mushrooms with olive oil, balsamic vinegar, minced garlic, thyme, salt, and pepper.
   3. Spread the mushrooms in a single layer on a baking sheet lined with parchment paper.
   4. Roast in the oven for 15-20 minutes, stirring halfway through, until the mushrooms are golden and tender. Set aside.
2. Prepare the Horseradish Aioli:
   1. In a small bowl, whisk together the mayonnaise, prepared horseradish, lemon juice, minced garlic, salt, and pepper until smooth.
   2. Taste and adjust seasoning as needed. Set aside.
3. Assemble the Sandwich:
   1. Heat a skillet over medium heat and add a small amount of olive oil.
   2. Lightly toast the bread slices in the skillet until golden brown on each side.
   3. Spread a generous amount of horseradish aioli on each slice of toasted bread.
   4. Layer the roasted mushrooms on the bottom slice of each sandwich.
   5. Add fresh arugula on top of the mushrooms.
   6. If using cheese, place a slice on top of the arugula.
   7. Top with the remaining slice of bread, aioli side down.
4. Serve:
   1. Cut the sandwich in half and serve immediately.
   2. Enjoy with a side of chips, salad, or soup for a complete meal.