A recipe from Tree:

In the fall giant puffball mushrooms seem to be everywhere ... forests, roadsides, city parks and empty lots. Safe to eat (as long as they are still fresh and white inside), hard to mistake for anything dangerous, but honestly pretty bland.

Generally, I think they work well as a tofu replacement in most recipes. Puffball bacon is my favorite:

Cut the mushroom into thin bacon like strips

Marinate the strips for several hours in tamari or soy sauce with a touch of maple syrup and a bit of nutritional yeast

Heat a lightly oiled pan (an iron skillet works best) over high heat.

When the pan is hot, fry the mushroom bacon until it is almost crispy.

Flip the bacon multiple times while you are frying. It's inevitable that some will stick to the pan, but the burned bacon bits are pretty tasty anyway.

Let the bacon cool in the pan, and it will continue to crisp a little bit.

I love to use the mushroom bacon to make BLTs, but it works great crumpled over salads, or in any recipe that one might use bacon as an accent.

Enjoy.