Caramelized Onion Parmesan Pasta Sauce

Ingredients

• 12 oz (340 g) pasta
• 2 tablespoons butter
• 2 large yellow onions, thinly sliced
• 1/2 teaspoon salt
• 1/2 cup (120 ml) heavy cream
• 1/2 cup (50 g) finely grated parmesan
• 1/2 cup (120 ml) reserved pasta water, as needed
• Black pepper, to taste

Instructions

1. 1

   Melt butter in a wide skillet over medium-low heat.

2. 2

   Add onions and salt. Cook slowly, stirring often, until deeply golden and soft, about 25 to 30 minutes.

3. 3

   Cook the pasta until al dente and reserve pasta water.

4. 4

   Add cream to the onions and bring to a gentle simmer.

5. 5

   Lower the heat and stir in parmesan.

6. 6

   Add pasta and toss well, loosening with pasta water as needed.