Making Brown Butter Sage Pasta is straightforward. Follow these steps for a delicious result:

1. Cook the Pasta: In a large pot, bring salted water to a boil. Add the pasta and cook according to package instructions until al dente. Reserve 1 cup of pasta water, then drain the pasta.
2. Brown the Butter: In a large skillet, melt the unsalted butter over medium heat. Stir frequently until the butter turns golden brown and develops a nutty aroma, about 5 minutes.
3. Add the Sage: Once the butter is browned, add the fresh sage leaves to the skillet. Cook for 1-2 minutes until the sage becomes crispy.
4. Combine Pasta and Sauce: Add the drained pasta to the skillet, tossing it in the brown butter and sage mixture. If the pasta seems dry, gradually add reserved pasta water until you reach your desired consistency.
5. Season: Season the pasta with salt, pepper, and crushed red pepper flakes if using. Toss everything together to ensure even coating.
6. Serve: Remove from heat and stir in the grated Parmesan cheese until melted and well combined.
7. Garnish: Plate the pasta and garnish with additional Parmesan cheese and crispy sage leaves.
8. Enjoy: Serve immediately, savoring each bite of this incredible dish.