Grilled Portobello Mushroom Burger With Mango Strips

For the grilled portobello mushroom burger

• To prepare the grilled portobello mushroom burger place the mushroom caps, smooth side up, in a shallow dish.
• Whisk together the vinegar, oil, garlic and salt and pepper to taste.
• Pour over the mushrooms and leave to stand for 15 minutes, turning twice.
• Heat the broiler (grill).
• Toast the burger buns and set aside.
• Place the mushrooms on the broiler, reserving the marinade for basting.
• Grill for 5-8 minutes on each side, until tender, brushing with the marinade frequently.

For the sauce

• Put the garlic, egg yolks and mustard into a food processor or blender.
• Blend into a paste and very slowly drizzle in the olive oil to make a thick mayonnaise-like sauce.
• Add the lemon juice and season to taste with salt and pepper.
• Place a few salad leaves on the base of each burger bun.
• Top with a mushroom cap, smooth side down.
• Spoon some salsa on each grilled mushroom cap.
• Garnish with mango strips, chilis and bean sprouts.