, last night I did can not sleep thinking the best way to prepare a typical hamburger with special famous ingredients made in my city: Parmigiano Reggiano cheese and traditional balsamic vinegar.... So this is the right way I thought 
First. cooking onion a few rubbed with paprika and white sugar, and zucchini
second. when vegetables are done pick up in a plate and put your beef burger on the grill (indirect) smoking with apple wood chips
(I used beef burger of "bianca modenese" cow that is a very old type of milk-meat cow grown only in the mountain near my townthird. at the end of smoking put on again the vegetables to keep its warm, and Parmigiano Reggiano cheese roughly chopped on the meat
p.s. one burger without Parmigiano cheese for my daddy...he doesn't like Parmigiano (buuuu
)fourth. 20 minutes to wait a partial fusion of parmigiano cheese and the last 5 minutes add an other less seasoned cheese you prefer... I like put on bread to warm it a bit also
fifth. the lower layer I put zucchini, caramelized onion, beef and finally a generous dose of balsamic vinegar over the fused cheese ( Attention please: the real balsamic vinegar is not liquid as that you can find at supermarket...the real is a bit creamy and will not drain everywhere
)And the most important passage....Enjoy your Modena Burger!
