Combine the balsamic, sugar, garlic and oregano in a glass measuring cup. Slowly pour the oil in a steady stream while whisking continuously whisking. Add the spices and sugar and correct for seasoning.
If you have a hard time whisking, hold the whisk between the palm of both hands and swish back and forth (like you're washing your hands) while keeping the whisk at the bottom of the measuring cup the whole time.
Follow the recipe but place the ingredients in a jelly or canning jar. Shake vigorously to incorporate and mix the dressing.