Our Younger Daughter loves salsa, and tomatillos have a reputation for taking it to the next level, so I want to try them that way. If I get a successful crop this year, I'll probably make some sauce, but what we really go through is canned tomatoes. One time a couple of years ago, the owner of a nearby display garden invited us to help ourselves to the last tomatoes in their kitchen garden, because they'd used all they wanted, and the plants were due to come out for the next crop. They were mostly cherry toms. I squashed them as tight as I could into small-ish Fowlers jars, along with a few herbs, topped up with just a little bit of water and put them in the water bath. They turned out great, and were about as low hassle as anything could be.
Both tomatillos and cape gooseberries could be dealt with in the same way, except I'm not sure I'd want to use a whole bottleful of those at one sitting. 🙂 But at the moment, they're all just tiny seeds... so I won't plan too far ahead yet. Generally though, I like experimenting with unusual vegs, and I usually find a way to use them.