Meta Flavor recommends the following images for your Teaser (non-menu) images:

Your logo. Minimum recommended dimensions are 250x250 pixels.

One to two photos of the outside of your restaurant so someone could easily identify your place from the street.

A photo of the manager or owner.

Five to ten photos of your friendly staff, satisfied guests and main dining areas.

Three to four photos of signature dishes. Remember, your menu is the main area for photos of your menu items.