Have you ever made oregano pesto? I have so much oregano, I certainly have! It self seeds everywhere (you know I love self seeding). I'm with you though, I NEVER have luck with peas - ever! Broad beans (fava beans) are easy, and snow peas (mange tout) but peas, nup.
Fava beans are very common here, so are lupin beans. And they're pretty.
I never made oregano pesto, the taste is very intense - but there is a sauce called "chimichurri" here that is basically a load of oregano, garlic and chili, all crushed together with oil. That's really good stuff.
As this patch of oregano was dying, I took some away and planted it in another pot. Who knows. Maybe it'll keep growing. In the real garden there are many herbs, and also a few oregano plants. But it's not doing thaaaat well, just growing here and there a little.
I make chimichurri! I love it.
The way I doy pesto is to mellow it a bit with kale, and add whatever nuts or seeds I have, olive oil and garlic, some fetta or Parmesan maybe. So it softens the oregano.
Mixing with kale is an interesting idea. I use lupine beans instead of the cheese and nuts, it's great stuff and readily available here. If my plants come back in an epic way, I'll try that pesto! Thank you for the idea!