Cheesy BBQ Shroom Burger
Yields
4 servingsPrep Time
10Cook Time
8-10 minutesTotal Time
1 hour
Ingredients
- 1 head garlic
- ½ cup olive oil, divided
- 1 cup Weber® Sweet & Thick Original BBQ Sauce
- ¼ cup apple cider vinegar
- 6 large portobello mushrooms, same size as rolls
- 1 large Vidalia onion, cut into 6 thick slices
- ½ cup mayonnaise
- 2 tbsp Weber® Sweet & Thick Original BBQ Sauce
- 8 oz white cheddar cheese, sliced thin and brought to room temperature
- 8 oz Parmigiano Reggiano cheese, shaved
- Kosher salt and fresh ground pepper, to taste
- 6 onion rolls
These Grilled Portobello BBQ Sandwiches are packed with bold flavors. Marinated mushrooms and onions are grilled to perfection, then layered with roasted garlic mayo, melty cheese, and toasted onion rolls. A hearty and satisfying dish for any occasion!
Directions
- Roast Garlic: Preheat grill to medium heat 350°F–400°F.
- Cut top off garlic head to expose the cloves slightly. Drizzle with olive oil, wrap tightly in foil, and place on the grill.
- Roast for 30–40 minutes, or until the cloves are soft and golden brown. Remove from the grill and let cool.
- Marinade: In a bowl, whisk together 1 cup BBQ sauce, apple cider vinegar, and remaining olive oil. Set aside.
- Clean the mushrooms and remove the stems. Place the mushrooms and onion slices in a shallow bowl. Pour the marinade over them, ensuring they are well-coated. Let marinate for 10–30 minutes before grilling.
- Grill Mushrooms and Onions: Remove the mushrooms from the marinade, ensuring the underside retains any liquid. Reserve the remaining marinade for basting.
- Place the mushrooms (gill side up) and onion slices on the grill. Cook for 8–10 minutes, then flip and grill for an additional 1–2 minutes. Brush with the reserved marinade during the final minute. The mushrooms should be tender, and the onions should retain a slight crispness.
- Garlic BBQ Mayonnaise: Squeeze the roasted garlic cloves from their skins into a small bowl. Mash until smooth, then mix with the mayonnaise and 2 tablespoons BBQ sauce.
- Assemble the Sandwiches: Spread the garlic BBQ mayonnaise on both sides of each onion roll.
- Layer a grilled mushroom, onion slice, white cheddar, and shaved Parmigiano Reggiano on the bottom half of the roll. For melted cheese, place the cheese on the mushroom during the last 2 minutes of grilling.
Tips & Tricks
- If you want even more richness, butter the onion rolls lightly and toast them on the grill for 1–2 minutes before assembling the sandwiches. This adds a nice crunch and enhances the overall flavor.
