Bring a large pot of salted water to a boil and cook the chickpea linguine according to package directions until al dente.
While the pasta cooks, heat a large non-stick skillet over medium heat and add the sliced cremini mushrooms and minced shallots.
Sauté the mushrooms and shallots for 5 to 7 minutes until the mushrooms are deeply browned and their moisture has evaporated.
Add the minced garlic to the skillet and cook for an additional 60 seconds until fragrant.
In a small bowl, whisk together the non-fat Greek yogurt, egg white, and grated parmesan cheese until the mixture is completely smooth.
Drain the cooked pasta, reserving 0.25 cup of the starchy pasta water, then return the pasta to the pot over very low heat.
Stir the sautéed mushroom mixture and the yogurt sauce into the pasta, adding the reserved water a tablespoon at a time to reach a creamy consistency.
Remove the pot from the heat immediately to prevent the sauce from curdling, then drizzle with truffle oil and season with sea salt and black pepper.
Garnish the dish with fresh chopped parsley and serve immediately while hot.