Non-count nouns, like rice and hair, for example, are made up of grains and strands, respectively. If the grains and the strands can be counted, then "many" is used. If there are way too many of them to count, then "much" is used. The same does not apply to "fries". "fries" is a count noun:Originally Posted by jack
EX: I have (too) many fries.
EX: I have a lot of fries.
But if the speaker is referring to the fries as a whole, then "much" is possible, but it's idiomatic, and not the Standard:
EX: I have (too) much fries on my plate.