I know a wonderful forager in Flagstaff who mentioned eating Siberian elm leaves, and commented on their mild flavor. I have been meaning for years to look for more uses for the noxious invasive elm, and my goat and chickens eat huge amounts, but I had only found one source alluding to them being edible by people, so I was hesitant. But if Mike says it I believe it, so I was newly inspired to experiment. I could imagine the texture being chewy, as is often the case with tree leaves, so I decided on a context in which the leaves would be chopped very finely. A pasta akin to spinach pasta seemed like a natural experiment.
I was just playing around in the yard, so all measurements given here are inexact. This makes two servings. I gathered a double handful of tree leaves, mostly young Siberian elm tips but also a small fig leaf, a very large grape leaf, and some young mulberry leaves. Fresh pasta only cooks for a minute or two, so I precooked the leaves in the steamer for seven minutes at fairly high heat. Once they were steamed, I turned them out on a cutting board and chopped them roughly with a knife. Then I put a heaping cup of flour in the food processor, added the leaves, and ran the machine until the leaves were chopped as finely as possible. Then I added egg yolks one at a time until the dough formed. For me, this took five yolks. It might be more or less depending on your ambient humidity and your flour. At this point I had a smooth, slightly sticky lump of dough.
I set the dough aside for half an hour to rest, and then set out a cutting board generously sprinkled with flour. I used my Kitchenaid pasta roller to roll the dough, but you could use a hand-crank roller or roll it by hand. Use as much flour as you need to keep it rolling smoothly. I have a metal clothes-drying rack that I use to hang the sheets of pasta as I work with them. This is a good way to keep them organized. Also, they look pretty when sunlight from the window glows through them. These transient pleasures are part of home cooking.
I rolled up the sheets, dusting with flour again, and cut them into linguine by hand because I like the uneven edges that result from hand-cutting. They do have to be delicately untangled after cutting.
Once the pasta is cut, dinner is simple. Heat up a pot of salted water to boiling, and while it’s heating, set out 2 tablespoons of good grassfed butter and grate a handful of top-quality Parmesan. Have a strainer ready in your sink, and set out two pasta bowls. Have your pepper grinder ready; I have a separate grinder for white peppercorns for more delicate dishes like this one. Put the noodles in the boiling water, keep the heat high, and start testing by biting a fished-out strand as soon as the pot returns to a full boil. Mine was done in about one and a half minutes of boiling. Scoop out about half a cup of water for a “pasta roux” and dump the noodles into the strainer. While they drain, add the butter to the pot, grate about ten turns of the pepper mill over the butter, and return the hot noodles to the pot. This all has to happen fairly quickly, before the noodles stick together. Add most of the grated cheese, toss with two wooden spoons, and add only enough of the pasta water to make the noodles move freely when tossed. Serve into the waiting bowls and top with a bit more cheese.
Here’s how the noodles look before the additional cheese is added. They’re good this way too, but I do like the grainy texture of unmelted Parmesan on top.
We found this absolutely delicious, but then it’s hard to go wrong when you’re using really high-quality Parmesan. It makes everything taste good, so I make no special claims for my leaf pasta. I can say that there is no strong or objectionable flavor of any kind and the texture is light and lovely. It makes use of one of the most Godawful weed trees imaginable, and makes it taste good, and I am satisfied with that. Beyond question, it adds additional fiber to the pasta. What it adds beyond that is unclear, since there is no nutritional analysis of Siberian elm leaves that I can locate. Be satisfied with the fact that you are eating your invasives and they taste good.
This would also be a delicious pasta with some really good olive oil and pinenuts, and it would be excellent for lasagna. I’m also going to try adding some fresh herbs at the processing stage so that their flavor is actually incorporated within the pasta; I think marjoram would be particularly good in this context. Some cream would be great in the sauce.