Air fry (or bake) the fries until crispy. I set mine to 375 degrees and air fried for about 15 minutes but this varies, so check them at 10 minutes and go from there.
Assemble the sauce. To a big enough bowl add the vegan yogurt, ketchup, mustard, dill relish, and white vinegar.
Caramelize the onions by sauteeing them in avocado oil. Add a few tbsp balsamic vinegar to help them along and brown. This process should take about 15-20 minutes.
Plate the fries and top with anywhere from 2-4 slices of vegan cheese and as much of the sauce as you'd like. Microwave (or bake) until the cheese is melted, about 2 minutes, then finish with the caramelized onions. Enjoy!