The world is all about producing content; We produce this blog every day. Did you ask for it? No, we produce it to get our thoughts and ideas out into the world in hopes that someone is listing. But our business is about helping you with your business, so providing information and content is important.
In your restaurant, you don't make money from content. Telling people a story about grandma's recipe may tug on someone's heartstrings, but what it comes down to is that people go to a restaurant to eat and have an experience.
So don't spend time and money crafting content by writing newsletters and blogs; create simple marketing messages that are consistent and allow you to track and measure your marketing efforts vs sales produced.
Save your content creation to serving the guest and connecting with them when they are in the restaurant.