First, grow and dig potatoes: Approximately 3.999 months

Then clean and slice them thinly: 5 minutes (with the food processor)

Layer in a casserole dish, alternately with Greek youghurt (or sour cream), olive oil and salt.

Top it off with a smidgen of cheese - something rich and sweet, or something bold like chèvre.  Add chives or green onions before or after baking... or both.

Bake until done (cheat and microwave it for 5 minutes while the oven preheats).

Total time ~4 months