Transform humble frozen cauliflower into a delectable and satisfying side dish with this incredibly simple recipe. Perfect for those evenings when you need a flavorful accompaniment without the fuss, this dish brings out the best in frozen cauliflower, turning it into something truly special. Imagine tender cauliflower florets, gently roasted to a delicate crisp-tender texture.

The natural sweetness of the cauliflower is enhanced by the savory depth of sautéed white onion, creating a foundation of flavor that is both comforting and inviting. A touch of garlic powder adds a subtle warmth, complementing the other flavors without overpowering them. A generous amount of butter, melted and coating each floret, infuses the cauliflower with a rich, creamy flavor that elevates the entire dish.

The butter not only adds to the taste but also helps the cauliflower achieve that desirable golden-brown color as it roasts in the oven. As a final touch, a dusting of freshly grated Parmesan cheese adds a salty, nutty note that perfectly balances the richness of the butter and the mildness of the cauliflower. The Parmesan melts slightly during the last few minutes of roasting, creating a delightful, savory crust that is simply irresistible.

This dish is not only delicious but also incredibly versatile. It pairs well with a variety of main courses, from roasted chicken and grilled steak to baked fish and vegetarian entrees. It's also a great way to add more vegetables to your diet without sacrificing flavor or enjoyment.

Feel free to adapt this recipe to your liking. For a dairy-free option, substitute the butter with olive oil or coconut oil, and replace the Parmesan cheese with nutritional yeast for a cheesy, umami flavor. No matter how you choose to prepare it, this roasted cauliflower dish is sure to become a family favorite.