
Preheat the oven to 425°F. Line a rimmed baking sheet with parchment.
Arrange the broccoli florets in a single layer on the prepared baking sheet, drizzle with the olive oil, and then sprinkle generously with salt and pepper. Toss to coat.
Roast the broccoli for 15 minutes, then flip and roast for an additional 5 to 10 minutes, or until fork-tender and slightly browned on the edges.
While the broccoli is roasting, make the sauce: Place the heavy cream, cheddar cheese, garlic, Dijon mustard, hot sauce, salt, and pepper in a large saucepan over medium heat. Stir continuously until the cheese has melted and the ingredients are well incorporated, then reduce the heat to low and stir occasionally while the broccoli finishes roasting.
Plate the broccoli, and top with the cheese sauce and bacon before serving.