A food that rhymes with "plastic" is "fantastic." While "fantastic" itself isn't a food, it can describe a delicious dish or meal that you might enjoy. If you're looking for a more direct food rhyme, "pasta" is a close match, though it's not an exact rhyme.
plastic
melted plastic
Pickle is a food that rhymes with tickle.
A food that rhymes with fox is lox.
fake cake
there is not a food that rhymes with black
Plastic
food
The word soup has these rhymes: loop poop coop goop hoop
something that you do with your food that rhymes with threw is to chew
food
plastic fantastic drastic spastic mastic elastic thermoplastic