Caramelized Onion Pasta

"Slowly cooking the sliced onions in butter and olive oil coaxes out their natural sugars, turning them deeply golden, sweet, and almost jammy. Pasta water and finely grated Parmesan do double duty here, adding seasoning and structure as they emulsify into a silky, cream-free sauce. Finished with a squeeze of lemon and fresh parsley, this easy vegetarian pasta is proof that a luxurious dinner can come from the most basic pantry ingredients."

"How long does it take to caramelize onions?True caramelized onions take at least 30 minutes over medium heat. Stir occasionally and resist the urge to rush-low, steady heat is key to developing deep flavor without burning. What type of onions work best?Sweet onions (Vidalia, Maui, Walla Walla) or yellow onions are the best for caramelized onion pasta because they soften evenly and develop a balanced sweetness."

Slowly cooking sliced onions in butter and olive oil draws out natural sugars, producing deeply golden, sweet, and almost jammy onions. Finely grated Parmesan combined with reserved pasta water emulsifies into a silky, cream-free sauce that seasons and structures the dish. Long pasta strands such as linguine, spaghetti, or fettuccine hold the sauce best. Sweet or yellow onions are preferred for balanced sweetness; white or red onions can be used if necessary. True caramelization requires at least 30 minutes over medium heat with occasional stirring. Optional additions include red pepper flakes, herbs, mushrooms, breadcrumbs, or a poached egg.

Read at Epicurious