The hot tortilla will harden around the colder ice cream/sorbet, and quickly become crisp, while the ice cream/sorbet will begin to melt from the heat of the tortilla.
(The hot tortilla; will harden; around the colder ice cream/sorbet) (The hot tortilla; quickly become; crisp) (the ice cream/sorbet; will begin; ) (the ice cream/sorbet; to melt; from the heat of the tortilla)
The hot tortilla The hot tortilla the ice cream/sorbet the ice cream/sorbet
will harden quickly become will begin to melt
around the colder ice cream/sorbet
crisp
from the heat of the tortilla