Cook the potato gnocchi according to the package directions in a 3-quart saucepan. Once cooked, drain the gnocchi making sure to reserve ½ cup of the starchy cooking water. Set the drained gnocchi aside (along with the reserved water) and keep warm.
Meanwhile, heat the olive oil in a large high-sided skillet over medium-high heat. Add the pancetta to the pan and sauté it for 2-3 minutes.
Add the chopped onion to the skillet with the pancetta and continue cooking, stirring occasionally, for 4-5 minutes until the onions turn semi-translucent and soften.
Add the cleaned and chopped mushrooms to the skillet, along with the butter, and sauté the mushrooms until they start to brown (approximately 4-5 minutes) before adding 1 teaspoon coarse salt, and ½ teaspoon black pepper.
Add the mascarpone cheese and the lemon juice to the skillet stirring to incorporate and melt the cheese into the mushrooms.
Reduce the heat to medium and add the spinach leaves into the skillet along with the grated nutmeg, the remaining ½ teaspoon of salt, and ¼ teaspoon of pepper. Cover and cook until the spinach has wilted and decreased in volume considerably.
Add the cooked and drained potato gnocchi to the skillet along with the ½ cup of reserved starchy cooking water, and the Parmesan cheese. Stir well to combine all the ingredients and cook for an additional 2-3 minutes to thicken the sauce.
Serve hot with additional Parmesan cheese over the top, and enjoy!
Video
Notes
Store any leftovers in an airtight container in the refrigerator for up to 5 days.May be frozen in an airtight freezer container or freezer bag for up to 3 months.