Comforting and quick, this caramelized onion pasta uses a pressure cooker to speed up the process and deliver golden, sweet onions paired with tender spaghetti and a generous snowfall of Parmesan cheese.
Bring a large pot of salted water to a boil and cook pasta according to package directions. Reserve 1 cup pasta water and drain pasta.
Heat olive oil in a large skillet over medium heat. Add sliced onions and cook, stirring occasionally, until golden brown and caramelized, about 25 to 30 minutes.
Add a splash of reserved pasta water to onions to deglaze and keep them from sticking.
Toss the drained pasta into the skillet and mix with onions until well coated. Add additional pasta water if too dry.
Serve hot topped with freshly grated Parmigiano Reggiano.
Notes
Use pressure cooker to sauté and pressure-steam onions for speed. Save pasta water for silky sauce.