COOK IT.
Set up your Nexgrill for high, direct heat. About 450 degrees.
Grill your ¼ in. thick chicken breasts about 2 minutes per side so that they’re only just cooked through. If they aren’t fully done yet, that’s okay. The chicken will continue cooking through the next couple of steps.
Place a few slices of cheese on each chicken breast, close the lid of your Nexgrill, and let melt for about 45 seconds.
Meanwhile, brush the cut side of your halved lemons with oil and grill cut-side-down until golden brown. About 45 seconds.
Once your cheese is nice and melty, transfer chicken to large serving plates and top each breast with 2 slices of prosciutto and some arugula.
Squeeze grilled lemon halves over top, drizzle with olive oil, and enjoy. See? Told you it was easy!