Has resident fungus-expert @theclaud seen this? I know some of the bracket fungi are edible - you might have dinner there for the whole family!
Disclaimer 1 - I am no expert.
Disclaimer 2 - never eat anything based solely on an ID by some muppet over the internet.
Looks like a Dryad's Saddle. Very young ones are notionally edible, but not necessarily much good. They look pretty spectacular though, so I reckon on balance they are best left on the tree...