Cut the beef into cubes and sear them in a frying pan in extra virgin olive oil. Season with salt.
Prepare a sauce con the extra virgin olive oil, garlic, San Marzano DOP tomatoes and marjoram. Season with salt and pepper.
Line an oven tray with baking paper.
With the help of a spoon, spread the parmesan on the tray in 4 circles of about 7-8 inches in diameter.
Cook them at 360°F for a few minutes until the edges of the parmesan wafers start to turn golden.
When still warm and malleable, take a wafer with the baking paper and wrap it around a small round bowl to model it; press the cheese downwards with the back of a spoon to get the form you want; repeat for the other 3 wafers.
Carefully extract the wafer.
Remove the baking paper.
When cool fill each wafer with the tomato sauce and cubes of beef.