Clean mushrooms, wash if necessary. Screw out stems, chop finely. Fry heads in 2 tablespoons of hot oil for 2-3 minutes. Season, take out. Brown the stems in the frying fat. Cool down
Peel garlic and chop finely. Mix with honey, mustard and vinegar. Slowly stir in 3-4 tablespoons of oil. Stir in mayonnaise. Season to taste
Clean and wash the arugula and peppers. Pluck the rocket salad. Dice the bell peppers finely. Mix both with the mushroom stems into the mayonnaise. Fill into the mushrooms. Finely slice Parmesan cheese over them.