01 -
Clean the mushrooms with a damp paper towel and slice them into 1/4-inch pieces. Slice the onions into thin half-moons. Finely mince the garlic cloves. Roughly chop the fresh parsley, setting some aside for garnish.
02 -
Melt the butter in a large skillet over medium heat. Add the sliced onions and minced garlic, and sauté until soft and translucent, about 3-4 minutes. Add all the mushrooms and cook for another 3-4 minutes until they begin to release their moisture and brown slightly.
03 -
Season with paprika, salt, and pepper, then pour in the cream and vegetable broth. Stir well, cover, and let simmer on medium-low heat for about 10 minutes to develop the flavors. In a small bowl, mix the cornstarch with a tablespoon of cold water to create a slurry. Stir this into the sauce and let it simmer for another minute to thicken. Stir in most of the chopped parsley.
04 -
While the sauce is simmering, bring a large pot of generously salted water to a boil. Cook the spaghetti according to package instructions until al dente (usually 8-10 minutes). Drain, reserving a cup of pasta water.