I mostly make sandwiches these days. I have a small 2-way fridge in my van along with a little cooktop but storage space is at a premium and there's just not enough room for a small grill. Also, meal prep is a hassle so sandwiches on disposable plates or cheese and apples is the way I like to do things.
Meals are a BIG thing for most campers, I'm glad they're not for me. But I should add that my sandwiches are usually some sort of deli meat (preferably Italian), sliced tomato, red onion, soft ripened cheese like brie, and great crusty bread. I usually have a couple bottles of a nice Cabernet on board, and other snacks like beef jerky, trail mix, etc. And in warm weather, there's always a little good craft beer in the fridge.