A cast iron skillet. If you use it regularly the seasoning will be so good that it’s as functional as any PTFE nonstick pan, you can use metal cooking utensils on it instead of having to get plastic/silicone stuff (for PTFE), and it serves many purposes from stove top to oven. If you can find a “vintage” one at a yard sale from when they used to hand polish them smooth instead of pre-seasoning them with a rough texture, even better. When I bought a small Lodge one years ago, I used a grinder and sanding discs to polish off the factory textured seasoning and re-seasoned it myself, which worked a charm! If you go that route, I recommend doing it outside, because the amount of metal dust that it stirs up is impressive (and magnetic, so an absolute mess to clean up).