Here is a nice ppt for teaching basic foods and ordering in a restaurant.
Also see these Gif Lingua presentations with vocabulary quizzes and games at the end of each book.
Students will enjoy this classic Grapevine video. More like this here.
This is a nice animated video with a basic dialogue for ordering food at a restaurant.
Use the PDF handout provided for teachers.
This is a cool video - Order McDonald's like a boss!
Here are a whole set of dialogue worksheets to be used by students to practice the language of ordering food.
Also read the "Restaurant" books on Gif Lingua and quizlet vocabulary sets (click the settings icon on any book homepage).