What's the healthiest fast food?

I'm curious, when it comes to fast food, what exactly would you consider to be the healthiest option? With so many options available, it's hard to decipher which ones are actually beneficial for our health. Could you perhaps shed some light on this topic, and maybe even suggest a few specific examples of healthy fast food choices? I'm eager to learn more about how to make healthier choices when dining out, especially when time is limited.