Preheat a fryer or a deep pot halfway filled with oil to 325 degrees F.
Combine flour and salt. Toss the onions in salted flour, shaking off excess flour. Fry the onions until golden brown. Reserve.
Chop the lobsters into several pieces, then deep fry the heads and save for garnish. In a hot wok, add oil and stir-fry the lobster pieces for 3 minutes. Add sauce and reduce until it is a glaze. Pile lobster onto a platter and garnish with fried onions, lemon and cilantro.
Combine all of the ingredients in a saucepot. Bring to a simmer over medium heat and cook until the sugar has dissolved.