Sun-dried tomatoes sound good too. Tomatoes are supposed to have umami. I can't really tell; or maybe their own taste overpowers it. Personally, I feel like nooch, onion, and garlic sub well for chicken. Beef and pork are harder. Shiitake is the best thing I've found. Nooch is awesome. It's great for chicken/egg/cheese flavoring. I'm a particular fan of this unchicken seasoning recipe.Have you tried cooking beans with either of those by any chance?
I have. I like shiitake or baby portobello, with a little soy sauce, with beans or bean soup. Emphasis on little; it's very easy to add too much, and then it tastes like soy sauce, which is awful. White mushrooms also work. They don't have as much umami, but they're cheaper. If it's just beans, not soup, the mushrooms will be much better pan-fried in butter first. Really draws out the flavor. Especially white mushrooms.maybe instead of the bacon or chicken wing or whatever, a dried mushroom or two
If I were making that particular recipe, I'd probably sub chopped shiitake for the meats. Or ground. If you figure out how to grind them, let me know, heh.