Step 1

Heat the oven to 400 degrees with a rack set in the lower third. On a sheet pan, combine the broccolini, tomatoes, onion and lemon slices with the olive oil and toss. Add cumin and red-pepper flakes, season with salt and pepper, and toss again until evenly coated. Nestle the feta slices into the vegetables. (It’s OK if they break apart a little.)

Step 2

Roast 15 to 20 minutes, stirring halfway through but leaving the feta in place, until the broccolini is charred at the tips, the stems are easily pierced with a fork and the tomato skins start to blister and break down.

Step 3

Serve over orzo or farro. Drizzle with olive oil and serve with the remaining lemon half for squeezing. Top with fresh herbs, if using.