It looks like Annona atemoya (Custard Apple).

Although I have never tried the fruit, Peterson's MEDICINAL PLANTS AND HERBS lists it as edible..."approved in Germany for nervous restlessness..." etc., just what we all need. They actually said the entire plant, roots and all, was edible, but at the end of the write up: "Potentially harmful in large amounts." There was also the caution icon next to the write up. I would check it out more before trying. I did see one of my mt. friends eat an azalea gall and some lichens, neither of which I would try UNLESS I was lost in the woods and starving. (And I don't harvest mushrooms, either. Not a risk taker I.)

Lookin' good. The plant will continue to grow foliage throughout the season. Josh

Cuke plant looks like it has a severe case of powdery mildew and maybe even spider mites - can't tell for sure about them from the pics. But given all the interveinal chlorosis they were nutrient deprived before the PM developed. That plant is likely not salvageable at this stage. The yellowing on the tomato plants combined with their retarded development and the leaf roll indicates over-watering along with nutrient deprivation. Neither is of a size to begin bearing fruit. So what, how much, and how often have you fed them? Dave