These fried pockets of deliciousness are based on the classic crab rangoons of Chinese takeout menus. They make perfect party appetizers because you can make the wontons ahead (be sure to cover with a damp cloth) and then fry them just before your guests arrive.
Mix together the softened cream cheese, lobster meat, scallions, soy sauce, and rice vinegar. Making sure the wonton wrappers are covered with a wet cloth, put 1 on a dry work surface and place a dollop of the cream cheese mixture in the middle. Dip your finger in water and trace it along all 4 edges of the wonton wrapper and fold 1 side over, making a triangle. (Try to make sure there isn't too much air inside the pocket.)
Place them on a tray so that none of the folded wontons are touching. Heat the oil so that it's shimmering (like a mirage), and fry the wontons in batches of 4 or 5 for about 1-1 ½ minutes each, making sure to turn them on the other side halfway through. Take them out as soon as the edges start to turn golden brown; they will continue to cook after taking them out. Put them on a plate covered with paper towels to drain. Serve hot with a dipping sauce like hoisin or sweet and sour.