Your homepage is the place you expect people to come first, so it should provide a short description of your restaurant, the type of food you provide and offer a portal to other areas of your site. It's worth keeping your text short and concise, while keeping the language friendly and approachable.
Sample Text: "Welcome to The City Grill! We are a family-run, independent restaurant offering the best quality steaks and surf ‘n’ turf options, in stunning and contemporary surroundings. We offer a great place to meet, eat and socialise for lunch or dinner, so please book a table with one of our friendly team or just pop in to say hello."