A ready made pizza dough and puff pastry are very handy stock ingredients, even stored in the freezer.
In Tuscany truffle stores are common. Good quality has its price, but if you skip meat or fish the total amount of your meal is still reasonable.
Spread a small container of truffle/porcini paste on a rectangular pizza dough. Spread 200-250 grams of thinly sliced mushrooms on the paste. Chop 4 garlic cloves and a handful of fresh parsley. Spread on the mushrooms. Add pepper and salt. Finish with 200 grams of the awesome (and low kcal cheese) stracchino.
Bake in the oven at 200° for 20-30 mins.
What a smell! Leftovers? No problem, great for the following day, even at room temperature.