When we say Filipinos aren't wasteful, we mean it. From pig ears (tenga ng baboy) and chitterlings (bulaklak) to chicken bottoms (puwet ng manok) and intestines (isaw), nothing is off the table — including developing bird embryos that are boiled and eaten from the shell. (Yes, we're talking about balut.) And all of the aforementioned dishes — and more, like fish balls and deep-fried bananas — are quintessential Filipino street food. Take isaw, for instance: It's so popular, university…