Done well, roasted Brussels sprouts shine with a balance of sweet and savory. But nailing that perfect balance calls for a long stay in a hot oven. And even then, the results can disappoint. Pile too many sprouts in the pan and they steam, turning mushy and dull. Let them go too long and they get dry and bitter. We wanted better, more reliable results, and in much less time. We found an answer in the charred Brussels sprouts at Gjelina (chef Travis Lett’s Los Angeles restaurant).