This breakfast will break you. Hundreds have tried, but fewer than 50 succeeded in scarfing down an epic stack of deep-dish pizza-sized pancakes at Nappi’s Nook in Nesconset as one of Long Island’s most popular – and deceptively difficult – eating challenges making rounds on social media.  “Everybody comes in, ‘oh that’s easy, I could do it, my son could do it!’” co-owner Steve Nappi, who runs the restaurant with his family, told The Post. Nappi’s Nook in Nesconset has become one of Long Island’s most popular restaurants for its viral eating challenge that has appeared across social media. The Post’s Alex Mitchell tried, but came up a pancake short. Heather Khalifa for NY Post “We’ve had well over 400 tries, with a success rate of probably 10% or around 40.” Josh Holland-Weiss was one of many who fell into the eyes-bigger-than-stomach trap when he tried and went viral for the challenge on hit Instagram page Long Island Wiseguy last month.…