1-First step: heat the oven and baking sheet Start by arranging a rack in the middle of the oven. Place a rimmed baking sheet on the rack, then heat the oven to 425°F. Letting the sheet heat up with the oven helps the broccoli start browning right away, which gives you better texture and deeper flavor. If you are using pre-cut broccoli florets, this step makes the recipe even faster.

2-Second step: prep the broccoli and garlic While the oven heats, place the broccoli florets in a large bowl. Add the thinly sliced garlic, olive oil, kosher salt, and red pepper flakes. Toss everything together until the broccoli is evenly coated. If your florets are large, trim them into bite-size pieces so they roast more evenly. You can also add broccoli stems if you want to use the whole vegetable, just peel the tougher outer layer and cut the stems into small pieces.

3-Third step: move everything to the hot sheet pan Carefully transfer the broccoli mixture to the hot baking sheet. Spread it out in a single layer and arrange the cut sides down where possible. This helps the edges brown and crisp instead of steaming. If the pan looks crowded, use two baking sheets so the florets roast properly. Crowding the pan can lead to softer broccoli, which is not what you want here.

4-Fourth step: roast until browned and crisp-tender Roast the broccoli for about 15 to 17 minutes, or until it is crisp-tender and browned at the edges. The exact time can vary a little based on your oven and the size of your florets, so start checking near the 15-minute mark. You want tender broccoli with some bite left, not mushy vegetables. The garlic should look golden and crisp, almost like little toasted chips.

5-Fifth step: finish with Parmesan, lemon zest, and lemon juice As soon as the broccoli comes out of the oven, sprinkle the hot florets with Parmesan cheese, lemon zest, and lemon juice. Toss everything together so the cheese melts into the broccoli while it is still warm. This final step is what gives Tuscan Roasted Broccoli its bright, savory finish. The lemon lifts the flavor, while the Parmesan adds saltiness and richness.