Can you riddle me this, riddle me that?

Stump me with your riddles!
‘First, the fish must be caught.’
That is easy: a baby, I think, could have
caught it.
‘Next, the fish must be bought.’ That is easy: a penny, I think, would have
bought it.

‘Now cook me the fish!’
That is easy, and will not take more than a minute.
‘Let it lie in a dish!’
That is easy, because it already is in it.

‘Bring it here! Let me sup!’
It is easy to set such a dish on the table.
‘Take the dish-cover up!’
Ah, that is so hard that I fear I’m unable!

For it holds like glue-
Holds the lid to the dish, while it lies in the
middle:
Which is easiest to do,
Un-dish-cover the fish, or dishcover the
riddle?

Solution