Papad is a roasted or deep-fried crunchy lentil appetizer/wafer that is a staple of munchies in Indian restaurants. (I always take glee in the general unsuccessful attempts (mine included) to describe dishes like papad.) —Annada Rathi
Buy any flavored papad from an Asian Indian grocery store. The most basic is the urad dal flavor. Others include black pepper, garlic, red chile, etc.
Heat oil in a pan on medium heat. After 7 to 8 minutes, add papad. Be ready with a pair of tongs. Immediately the papad will change color to a bright hue. Flip it and take it out before it turns dark.
If you want to avoid deep-frying, you can try roasting papad directly on the flame of stove. Hold papad with a pair of tongs over the flame. Flip and turn around constantly in order to avoid burn marks. Once the color turns to bright yellow, turn the heat off.
It's best to make papad right before serving, as it loses its crunch with time.