The most time consuming part of this is grilling the onions, so let's start that before anything else. Add the vegan butter and oil to a pan over medium / medium high heat. Once melted and bubbling, add your onions and stir to coat. Stir it frequently, and after 10 minutes, add in a pinch of salt and sugar, which will help with the flavor and browning.

You can try to multitask and grill the onions while you prepare the rest of the burger components, but either way, just keep an eye on them and make sure they don't brown too fast, or even worse, burn! Lower the heat as needed, stir frequently, and deglaze with some water if they stick to the pan. They should be perfect in about 45 minutes to 1 hour. Once they are done, remove from the heat and reserve.

Make the special sauce by combining all the ingredients in a bowl, taste and adjust for seasoning and store in the fridge.

Cook your Fries according to package instructions, either Air Fry or Deep Fry!

Add them to a wire rack and salt them immediately, or toss them in a bowl with some salt!

To melt the cheese, I will do a trick where I'll heat up a non-stick pan, add a little water and then the cheese right in the pan. You only need to heat it for like 10 seconds. Then quickly scoop it up with a non-stick spatula.

Slide the cheese onto the fries, followed by the sauce and onions and enjoy!