Toss the cut sprouts in the olive oil, thyme, salt and pepper.
Place the sprouts on an oiled or nonstick sheet tray and be careful to not overcrowd.
Place in the oven for 20-30 minutes until nicely colored. Pull out of oven and toss then tent loosely with foil and put back for another 10 to 12 minutes.
Remove from oven and toss with fresh lemon juice and lemon zest. Add more salt and pepper if needed.