Serve this so-flavorful side with roast chicken or fish.
Preheat oven to 425 degrees. In a medium bowl, toss cauliflower with olive oil; season with salt and pepper. Arrange in a single layer on a rimmed baking sheet and roast until tender and browned in spots, 15 minutes. Let cool 5 minutes. Return to bowl; add parsley, cheese, 1 teaspoon olive oil, and lemon juice. Toss to combine and season with salt and pepper. Serve warm or at room temperature.