I moved in 600 miles away and in with my bachelor father when I was 16. He knew (and still only knows) how to cook three things:
1) Lettuce Sandwiches. Lots of lettuce, lots of mayo, lots of salt
2) Cheese Toast. And ONLY using Cracker Barrel sharp cheddar
3) The day he figured out he could put Minute Rice into a pot of canned soup and water, he felt he had graduated culinary school
We ate out A LOT!