In 2020 I spotted a flowering Cereus Peruvianus outside a local pizza shop and as luck would have it some of my Cereus cuttings were flowering at the same time. A late night run snagged some pollen and was able to get two fruits:
One of them dropped off and got a bit banged up before I found it. Tasted a little bit of the white flesh and reminds me a bit of watermelon.
The seeds:
Planted about 30 of the seeds in regular potting soil and they germinated very quickly. A month or two out they are mostly around 1/4″. The purple color probably is because they are getting more sunlight than they need at this stage in their germination. Keeping them mostly in the shade but they do get a small amount of direct sun early in the day.