Add the white wine vinegar, avocado oil, strawberry freezer jam, Dijon mustard, Kosher salt, and fresh ground black pepper to a wide-mouth mason jar.
For a chunky vinaigrette, whisk vigorously for one to two minutes until combined.
For a smooth vinaigrette, use an immersion blender to blend the dressing directly in the jar until no strawberry pieces remain. This gives you a silky, restaurant-style texture.
Taste and adjust. Want more tang? Add a splash more vinegar. Want it a touch sweeter? Add a tiny bit more jam.
Serve immediately or store in the sealed jar in the refrigerator.
Notes
Note 1: This recipe is a great way to use up strawberry top vinegar, but if you don't have any, white wine vinegar will work too! Note 2: The recipe was tested with strawberry freezer jam, but any strawberry jam will work. Find an option with less ingredients.