Get your oven ready: Preheat it to a hot 450°F (232°C). Line a baking sheet with parchment paper or foil for a quick cleanup.
Season the cauliflower: In a large bowl, gently toss your small cauliflower florets with the olive oil, sea salt, and black pepper until they're all nicely coated.
Roast to golden perfection: Spread the seasoned cauliflower evenly on your prepared baking sheet. Pop it into the oven and roast for about 15-20 minutes, or until the cauliflower is tender and has lovely browned edges, bringing out its natural sweetness.
Craft the creamy cheese sauce: While the cauliflower is roasting, combine the shredded cheddar cheese, heavy cream, unsweetened almond milk, and unsalted butter in a small saucepan. Heat this mixture gently over low heat, stirring constantly, until all the cheese has melted into a smooth, luscious sauce.
Combine and enjoy: Once the roasted cauliflower is ready, transfer it back into a large bowl. Pour the warm, velvety cheese sauce over the cauliflower and gently fold to ensure every piece is covered in that delicious cheesy goodness. Serve immediately for a healthy and satisfying meal!