Prep the sprouts: Trim the ends, remove any wilted leaves, and slice Brussels sprouts in half. Pat them dry so they brown well.

Crisp the bacon (optional): In a large skillet, cook bacon over medium heat until crisp. Set aside on paper towels to drain. Wipe out excess grease, leaving a thin coating for flavor.

Brown the sprouts: Add olive oil and butter to the skillet. Place sprouts cut-side down in a single layer. Season with salt and pepper. Cook undisturbed for 4–6 minutes until the cut sides are deeply golden.

Soften and season: Stir and cook another 3–4 minutes until fork-tender but not mushy. If the pan looks dry, add a splash of water and cover for a minute to steam.

Build the sauce: Push sprouts to the edges. Add garlic to the center and sauté 30 seconds until fragrant. Pour in heavy cream, sprinkle in nutmeg and red pepper flakes, and stir to coat everything.

Thicken gently: Lower the heat and simmer 3–5 minutes, stirring, until the sauce reduces slightly. It should coat the back of a spoon.

Add cheese: Stir in Parmesan until melted and smooth. Taste and adjust salt and pepper. If using bacon, fold it in now.

Brighten (optional): Finish with a little lemon zest or a small squeeze of lemon to lift the richness.

Serve: Sprinkle with extra Parmesan and cracked black pepper. Serve hot as a side or a cozy main with grilled chicken, steak, or salmon.