Perfect Lemon Parmesan Spaghetti

0 Cook the angel hair pasta according to the instructions. Save half a cup of pasta water for later usage.
1 In a large skillet over medium heat, add butter, olive oil, minced garlic, and 1/2 cup of cubed red or white onion. Sauté for a few minutes.
2 Add 1/2 tablespoon lemon zest, 1/2 lemon juice, ½ cup of pasta water, 1 cup heavy cream, 1 cup of grated parmesan cheese, and salt and pepper. Make sure you keep stirring until the cream slightly thickens. 
3 Add in the drained angel hair pasta, and mix into the sauce until everything gets coated.
4 Garnish with chopped cilantro, or enjoy with crushed red pepper.