A picnic date can never go wrong. Pack all your favorite food, take a blanket, and enjoy nature together and take in all the fresh air.
If you two are fitness freaks, then it is best that you go on a walk or a jog together, and at the end of it, try out some salad bar for lunch.
Try a bookstore with a cafe. You can pick out some books and read through lunch or read out your favorite paragraph from the book while sipping coffee.
Just head to the beach. Gram some food and start walking. The sound of waves, along with your partner by your side would make it a prefect lunch date.
Go for a walk in one of the scenic parts of the city and try some street food.