Combine the vinegar, Dijon, soy sauce, minced garlic salt and pepper and whisk to combine. Add the olive oil and whisk until you get an emulsion. Taste and adjust seasoning/ingredients to your liking.
Note: I like to make dressing in a small jar with a lid. I can just put everything in, tighten the lid and shake. Then, if there is any left over, I can store it in the fridge in the same jar.