"You are asked to pick delicious food."
Translation:Kalian diminta untuk memilih makanan enak.
dipilih is to be chosen, not to choose. "Kamu diminta dipilih makanan enak" would mean "you were asked to be chosen by delicious food," which makes no sense. "Choose" in this sentence requires the active verb, "memilih" (or "pilih", depending on what you want to emphasize), not the passive "dipilih".