This looks like an Otidea but I'm wholly unsure about the species. It was growing alone, is 2 cm high and 1 cm wide.
It looks more like Peziza to me. I think that Otidea typically has more of an erect growth form suggestive of rabbit or donkey ears.
I can see how the camera perspective makes this look like a standard cup fungus. The side closest to the camera is basically even with the ground, while the rest of it wraps up like an ear - the far side of the fungus is nearly an inch high.
