How would you ask your boss for better food to eat during the day?

The options in the cafeteria are awful these days. It's just overpriced junk food. Bringing food from home is not an option. How would you ask your boss? Assume that it's you and 95% of the staff who feel the same way. We want to email him something since he's not really there but he is in charge of which vendors stock the caf.
How would you ask your boss for better food to eat during the day?
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