Downsizing my kitchen was fairly straight forward as I did not own anything that had real value or special meaning. I knew in the van I would have a one induction burner and little space for gadgets. Space was at a premium in the van. My kitchen has one upper cabinet, some wall Ikea containers and a utensil drawer for my kitchen/food storage.
I had a lovely set of stainless steel pots but knew they would not fit in the van so I purchased pots where the handle was removable and had to make sure they worked on the induction stove. My pots are easy to store, easy to clean and I love them. I have 3 pots and only really use one of them.
My only appliances are a collapsable kettle and coffee areopres. Both I purchased for the van, use them both every day and highly recommend both.
My other kitchen essentials are a travel mug for tea, another one for my coffee, a metal cup for brushing my teeth, 2 large plates, 2 small plates and collapsible bowls. Note: Rectangle ones are easier to store.
For utensils I have a chopping knife, paring knife, cutting board (that fits in the drawer), tongs, peeler, corkscrew and a set of small spatulas. Note: Full size spatulas are hard to store. I kept 4 forks, knives and spoons from my apartment utensils. I took all my others to the farm/cottage house. Tip: I use one of each of these so 2 each would probably be sufficient.
Everything else in my apartment kitchen was sold or given away.