Congrats! You are so talented and experienced that I never envisioned you in a desk job that you hated.
Your restaurant idea sounds wonderful.
My first thought is doing a themed restaurant that has a sci-fi/art/graphics/anything store on one side. There's a store where I live that sells home and garden stuff and it is really grassy and gardeny outside. But when you walk inside, they sell awesome jewelry, scarves, paintings, wines, foods, desserts, and home decor. It is paradise. During the warm months they do weekly live music and wine parties, monthly ladies night, and you can rent the beautiful lawn and garden areas for parties and any type of event.
It is a really fun place! You would love to own a place like that. You should.
Good luck.