The owner's questions
The café owner wants a one-glance report on the menu. Write a single query that answers it.
Present the report
Column names are part of the report. Owners read veg_dishes and avg_price far more easily than count and avg, so alias every computed column. Round money to whole rupees or two decimals, and sort by whatever the owner will scan first, often the number of dishes or the average price.
Finally, save the query in the project with a comment explaining what it answers. Next month someone will want the same report, and a well-named, commented query can be rerun in seconds.