Step 1

Preheat your oven to 400°F (200°C).

Step 2

Line a sheet pan with parchment paper, add the frozen Brussels sprouts over and scatter with a spatula. Roast for 15 minutes.

Step 3

Take the sheet pan out of the oven, drizzle with olive oil, and season with salt and pepper. With a spatula, give everything a quick stir.

Step 4

Return to the oven and roast for 12-15 more minutes or until the brussels sprouts are golden brown and crunchy from the outside.

Step 5

Serve with a squeeze of fresh lemon juice, and sprinkle with grated parmesan if desired.