I start by melting the butter in a large skillet over medium heat. It foams, then slowly turns golden with a nutty aroma. I stay close because it can burn quickly. Once it hits a deep amber shade, I lower the heat immediately to keep it perfect.
Next, I toss in the shallot and cook until soft and golden. Garlic and sage go in right after, and I stir them for a minute or two. The kitchen fills with an earthy, garlicky fragrance that makes me excited for what’s coming.
I pour in the broth, cream, and optional wine, whisking gently until smooth. Then, I add the tortellini straight into the pan. Cooking it right in the sauce makes it extra flavorful. I cover the pan and let it simmer for about 5–7 minutes.
When the tortellini is tender, I stir in Parmesan, a pinch of nutmeg, and season with salt, pepper, and red pepper flakes (if I want a little heat). The sauce thickens beautifully as it cools slightly.
I plate the tortellini hot, sprinkle extra Parmesan, and top with a sage leaf. Sometimes I pair it with crusty bread to scoop up every bit of that sauce.