Grilled Portobello Mushroom Sandwiches With Basil Aioli

Recipe by Greeny4444
READY IN: 20mins




  • Make the basil aioli: Combine the mayonnaise, garlic, basil, and lemon juice in a small bowl and whisk to mix. Season with salt and pepper to taste.
  • For the sandwiches: Cut the stems off the portobello mushrooms flush with the mushroom caps. Using the tip of a paring knife, make tiny holes in the caps and insert the garlic slivers and rosemary leaves (if using).
  • Combine the olive oil and balsamic vinegar in a small bowl and whisk to mix. Generously brush the portobello caps and tomato slices with some of the oil and vinegar mixture and season them with salt and pepper.
  • Set up the grill for direct grilling and preheat to high.
  • When ready to cook, place a vegetable grate on the hot grill and preheat the vegetable grate for 5 minutes.
  • Arrange the portobello caps, rounded side down, and the tomato slices on the hot grate and grill, turning with a spatula, until nicely browned and soft, 3 to 6 minutes per side. Brush the vegetables once or twice as they cook with the oil and vinegar mixture.
  • Spread the insides of the rolls or buns with basil aioli. Add the grilled mushrooms, the tomato slices, and the arugula, and enjoy.