All the answers (except maybe for 2) are in Leviticus 11 so no need to search other sources. The verse which decides the answer are the cents of the price. For instance, Alligator Stew costs $10.42 so verse 42 has the answer for that menu item.
The right answers are Locust Broth, Goose Soup (not mentioned as bad), Heavenly Halibut (has scales and fins), Ox in a box, Grasshopper Goulash, Goat in a Mote, Beetle Sherbet, and Cow Custard. But don’t just give them the answers. Have them dig in and discover the answers in the verses. Only tell them about the “cents” clue after they have guessed.