Q.Yellow hard skin squash
When I was younger, there was a yellow squash we used to eat.
The skin was rock hard, needed a hammer to break it open. the flesh tasted like corn.
Would you know the name of the squash and or where I could get it from.
This could be an older variety of winter squash. Hubbard and turban squashes usually have very hard skin, and some of these have yellow interiors like buttercup squash. Winter squashes usually have harder skins than summer squashes, but summer squashes can develop very hard skins if left on the vine too long, so that's another possibility.