It is not an idiom. When you see "as ___ as ___" you are dealing with a simile, and those are just comparisons between two things. "As nice as pie" would be very nice, because pie is a nice, tasty dessert.
To use the idiom "as nice as spice" in a sentence, you can say, "Her personality is as nice as spice, always adding warmth and flavor to any conversation."
This isn't an idiom. Soggy means damp and moist, no longer crispy. This sounds like a dialect speech, talking about a pie that got soggy.
The origin of the idiom finger in every pie is unknown. The saying means being involved in a lot of things or knowing about a lot of things.
"To be" is not an idiom - it's a verb.
In perfect order or condition or in tidy condition for example: everything was apple pie order
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Pest is not an idiom. It's a word.
The idiom "apple shiner" means the teacher's pet.
The meaning of the idiom in the pink of health means being in good health.
It's not an idiom because you can figure out the meaning by context. If something pleases your eye, it's nice to look at.
The idiom means impress someone is egg on
It's not an idiom - to cope means to deal with, or to handle