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