Cut eggs in half and seperate the yolks from the whites. Place the yolks in a medium mixing bowl and the whites on a cutting board.
Mash the yolks with a fork until somewhat smooth. Add the mayonnaise, mustard, salt, onion powder, white pepper, and MSG and continue mixing until well incorporated.
Chop the whites finely but not perfectly uniform, about 1/8-inch, with mostly small pieces and a few larger ones. The yolk mixture should be smooth; the whites should give the salad texture. Do not mince them into a paste.
Fold the whites into the yolk base using a rubber spatula until evenly mixed. Chill in the refrigerator for 20-30 minutes before serving.