If this leads to lawsuits, I suspect restaurants will end up having full recipes printed in a booklet that can be shown on request.
Thus ruining the lives of artisan chefs and preventing any gastronomic enjoyment by the vast majority. There'll be underground gourmet events, like Prohibition, only with food instead of liquor. Various government initiatives are already trying to shut down home gardening, or allowing farm family chilldren to work farm chores. Soon, dinner parties in one's own home will be required to provide "the pamphlet" -- full disclosure to your personal family members and guests before each meal. It is discrimination against Italian mothers! Where does it end?
If it cannot end in the voting booth (and in the permanently-Democrat state of Maryland, it cannot), then it must end in the logical extreme our constitution was written for.
There's a reason why God told Moses that covetousness is a sin. Those of us with allergies in our families must not let our envy of the allergy-free justify stealing their enjoyment of their food.