at my old job (roughly 60 people) the company just got regular lunch ingredients (usually some meats, cheese and just normal bread) for the entire company. culturally it was expected everyone had lunch in the common area from this stockpile. costs for this where deducted from your pay, but because it was bought at suchs a large scale it was very cheap compared to buying your own lunch or making it at home. (roughly 20€ per month I believe).

this system worked pretty nice imo, lunch wasn't anything fancy but it was healthy, cheap and having lunch with coworkers from other departments helped massively in regards to culture.