Identical Cousins?

It seems like forever that I've known that eggplant and tomatoes are related. Both are members of the night shade family, which also contains peppers, potatoes, tobacco, and bella donna. Besides recognizing that the food members of this botanical group pair well, I never gave it much thought, particularly in terms of appearance.

Until today. Summer has delivered a bounty of all things night shade and I am serving them up-- raw, roasted, fried, etc., it's not dinner without one of them. And so tonight I prepared these:

Now... which fruit of the night shade family might this be?