I've seen BLT pizza, which sounds similar. I didn't know salad pizza was a thing. It sounds like it might be really good or really bad depending on the freshness of the ingredients and the balance of softness to crispiness.
By MuWire, I meant the network, not the software. I wasn't aware it was being developed again, actually. Maybe the current political climate made the dev feel like his work was needed again. The network never died. I use Linux too. eMule and Gnutella both have Linux clients, but availability might vary from one distro to another. On openSuse Tumbleweed, we have aMule and GTK-Gnutella. Based on the IP addresses I see, they seem more popular in Europe than in the US.
Many of the old file-sharing networks are still around and actively in use. MuWire has a lot of interesting books and recordings. EMule is a good place to find music, including obscure remixes. Gnutella is mostly porn, including child porn that's so open I feel like it might be part of a law enforcement operation.
Retroshare seems like a p2p Facebook rather than a file-sharing network. I've always wanted to get into it, but I don't know anyone else using it.
Thank you for your service.