Make the Smoked Paprika Aioli (see recipe.) Heat the oil in a heavy 12″ skillet. When hot, add sliced mushrooms and quickly sauté to incorporate the oil over high heat. They will release some juices in a few minutes, then add leeks, garlic and tomato.
Stir well, add salt and pepper. Now add the dry sherry and brandy, stir in, turn the heat off.
To make the Tapas: Add 1/2″ slices of baguette to a rimmed baking tray. Toast in oven, or as I do broil far from the heat source, about 12″ until just lightly browned on top. Remove.
Add 1/2 teaspoon of Smoked Paprika Aioli on each slice, using a small knife.Top with a portion of the Mushroom mixture. Add a little more Smoked Paprika Aioli on top of the mushrooms (gives an amazing flavor!) At this point, they can be set aside, made earlier in the day (refrigerate if holding for more than 2 hours.)
Top each with some Mahón Cheese. Before serving broil 4″ from the heat source until bubbly, and the cheese just starts to brown.
Serve immediately. Add chopped parsley all over if desired.
*Mahón Cheese: a soft to hard cheese with buttery, sharp, salty in taste, with a sweet and nutty aroma. Its rind is rubbed with Spanish paprika. And – it melts beautifully!! Easily available at most better gourmet and specialty cheese shops.