1-First Step: Heat the oven and get the baking sheet hot Arrange a rack in the middle of the oven, then place a rimmed baking sheet on that rack. Heat the oven to 425°F. Letting the baking sheet heat up first helps the broccoli start browning the moment it hits the pan.

2-Second Step: Prep the broccoli and garlic Cut the broccoli into 1- to 1 1/2-inch florets if needed. If you bought pre-cut florets, trim any pieces that are too large so they roast evenly. Thinly slice 2 cloves of garlic. If you like a little extra texture, you can also include some peeled broccoli stems cut into small bite-size pieces.

3-Third Step: Toss with oil and seasonings Add the broccoli florets, sliced garlic, 3 tablespoons olive oil, 1/2 teaspoon kosher salt, and 1/4 teaspoon red pepper flakes to a large bowl. Toss well so every piece gets lightly coated. The oil helps the broccoli roast instead of steam, and the seasoning sticks better when the vegetables are evenly dressed.

4-Fourth Step: Spread on the hot sheet pan Carefully remove the hot baking sheet from the oven. Transfer the broccoli mixture onto the sheet in a single layer, cut-side down. This detail matters because the cut sides make contact with the hot pan and brown more quickly. If the broccoli is crowded, use two pans instead of piling everything together.

5-Fifth Step: Roast until crisp-tender Return the pan to the oven and roast for 15 to 17 minutes. You want the florets to be crisp-tender with browned edges. The exact time can vary a little depending on the size of your florets and how dark your oven runs. Stirring is not necessary during roasting, which keeps the edges nice and caramelized.

6-Final Step: Finish with Parmesan and lemon Once the broccoli comes out of the oven, sprinkle it immediately with 1/2 ounce finely grated Parmesan cheese, 1 teaspoon finely grated lemon zest, and 1 tablespoon freshly squeezed lemon juice. Toss everything together while the broccoli is still hot so the cheese melts slightly and the lemon coats each bite. Serve right away for the best texture and flavor.