Grilled Portobello Sandwich Recipe

Grilled Portobello sandwiches offer a hearty, meaty alternative for those who crave the texture and flavor of a classic sandwich without the meat.

Featuring marinated and grilled portobello mushrooms, this sandwich is packed with flavors and nutrients, making it perfect for vegetarians and meat-lovers alike.

grilled portobello sandwich recipe

Ingredients

Portobello Mushrooms:

  • 4 large portobello mushroom caps
  • 3 tablespoons olive oil
  • 2 tablespoons balsamic vinegar
  • 2 cloves garlic, minced
  • 1 teaspoon dried oregano
  • 1 teaspoon dried thyme
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper

For the Sandwich:

  • 4 ciabatta rolls or sandwich buns
  • 1 large tomato, sliced
  • 1 avocado, sliced
  • 1 small red onion, thinly sliced
  • 4 slices of provolone cheese (optional)
  • Fresh basil leaves
  • Mixed greens (arugula, spinach, or lettuce)
  • 2 tablespoons mayonnaise (or vegan mayo)
  • 1 tablespoon Dijon mustard

For the Roasted Red Pepper Aioli:

  • 1/2 cup roasted red peppers (jarred or homemade)
  • 1/4 cup mayonnaise (or vegan mayo)
  • 1 tablespoon lemon juice
  • 1 clove garlic, minced
  • Salt and pepper to taste

Instructions

Step 1: Prepare the Portobello Mushrooms

Start by gently cleaning the portobello mushroom caps with a damp paper towel to remove any dirt. Remove the stems and gills with a spoon to create a smooth surface for grilling.

In a small bowl, whisk together the olive oil, balsamic vinegar, minced garlic, oregano, thyme, salt, and black pepper. Place the mushroom caps in a large zip-top bag or shallow dish and pour the marinade over them.

Ensure the mushrooms are evenly coated. Marinate for at least 30 minutes, but for the best flavor, let them sit for 2 hours.

Step 2: Prepare the Roasted Red Pepper Aioli

In a blender or food processor, combine the roasted red peppers, mayonnaise, lemon juice, and minced garlic. Blend until smooth.

Add salt and pepper to taste, blending briefly to incorporate. Transfer the aioli to a small bowl and refrigerate until ready to use.

Step 3: Grill the Portobello Mushrooms

Preheat your grill to medium-high heat (about 375–400°F or 190–200°C). If using a grill pan, heat it over medium-high heat.

Remove the mushrooms from the marinade and shake off any excess. Place the mushrooms on the grill, gill side down. Grill for about 5–7 minutes per side, or until the mushrooms are tender and have nice grill marks.

If using cheese, add a slice of provolone on top of each mushroom during the last 2 minutes of grilling, allowing it to melt.

Step 4: Assemble the Sandwiches

While the mushrooms are grilling, lightly toast the ciabatta rolls or sandwich buns on the grill or in a toaster.In a small bowl, mix the mayonnaise and Dijon mustard together.

Assemble the Sandwiches:

  • Spread a generous layer of the roasted red pepper aioli on the bottom half of each toasted bun.
  • Place a grilled portobello mushroom cap on top of the aioli.
  • Add slices of tomato, avocado, and red onion on top of the mushroom.
  • Place a few fresh basil leaves and a handful of mixed greens over the vegetables.
  • Spread the mayonnaise-Dijon mixture on the top half of the bun and place it on top of the sandwich.

Step 5: Serve and Enjoy

  1. Slice and Serve: Use a sharp knife to slice each sandwich in half, if desired, and serve immediately.
  2. Optional Sides: Pair your grilled portobello sandwich with a side of sweet potato fries, a fresh green salad, or a bowl of soup for a complete meal.

Tips and Variations

For the best flavor, marinate the mushrooms for at least 2 hours. If you’re short on time, a 30-minute marinade will still yield delicious results.

Ensure your grill or grill pan is hot enough to achieve beautiful grill marks. This not only enhances the flavor but also adds visual appeal.

If you prefer a vegan option, omit the provolone cheese or use a dairy-free alternative.

Variations:

  • Spicy Kick: Add a pinch of red pepper flakes to the mushroom marinade or aioli for a spicy twist.
  • Herb Variations: Experiment with different herbs such as rosemary, basil, or parsley in the marinade.
  • Different Breads: Try using different types of bread such as whole grain rolls, baguettes, or even a wrap for a different texture and flavor profile.

Nutritional Information

While specific nutritional information will vary based on the exact ingredients and quantities used, a typical grilled portobello sandwich provides a healthy dose of vitamins, minerals, and antioxidants.

Portobello mushrooms are low in calories but high in fiber and protein, making them a nutritious meat substitute.

Conclusion

Grilled portobello sandwiches are a fantastic way to enjoy a hearty, flavorful meal that satisfies both vegetarians and meat-lovers alike.

With their meaty texture and rich marinade, these sandwiches are sure to become a favorite in your household. Whether for a casual lunch or a gourmet dinner, this recipe delivers on taste and nutrition.