I don’t think you can have a simpler dinner than this.
Make lots of thin V type incisions in a fairly large sweet potato after peeling it. Stuff in a lot of garlic. Rub olive oil. Sprinkle thyme or any dried herb. A little paprika or any spice.
Bake at 190 degrees Centigrade for 40 mins after wrapping in foil and placing in a baking dish. Baking dish will avoid any kitchen disasters in case there is any leakage in the foil.
Open the foil and keep baking it at the same temperature for another 20 minutes. When a knife passes thru without much resistance its done.
Slice the cooked sweet potato and eat it drenched in the garlicky olive oil that has collect in the base of the dish.