This should be one of your favorite risotto recipes! Light, creamy, and full of fresh spring colors and flavors, it's also vegan. While most risotto can easily be a scrumptious vegan food by using vegetable broth and eliminating the cheese,
Heat broth and lemon juice to a gentle simmer in a small pot.
In a large, deep, pan, heat the oil over medium heat. Add fennel, leek, and salt. Cook, stirring occasionally, for about 5 minutes, or until the fennel and leeks have softened partially. Stir in the mushrooms and garlic. Cook for another 8 minutes, until the mushrooms have started to release their moisture and turn brown.
Stir in the oats, coating them in oil, and toasting them for a couple of minutes. Reduce the heat to low and add the hot broth 2 ladlefuls at a time. Stir to combine and cook until the broth absorbs before adding more. Continue until all but the last couple of cups of broth are gone. Stir in the peas and the last of the broth and cook for a few minutes more. The whole process should take less than 30 minutes and the risotto should be tender, loose, and somewhat "brothy" when done, not dry and sticky. If the oats have not cooked through and the broth is gone, add more broth if you have it or use water, 1/4 cup at a time, and continue cooking until the oats are soft. Taste and season with more salt and black pepper, if desired.
Serve, garnished with parsley.