Heat Extra Melt® Cheese Sauce according to manufacturer's instruction. Stir in shredded cheese until melted. Hold hot until service.
Toss broccoli, olive oil and red pepper flakes in large bowl. Season with salt and pepper, as desired.
Grill over medium-high heat until broccoli is cooked through and slightly charred. Place lemons on grill, cut-side down. Grill until lemons are slightly charred.
To serve, plate 4 ounces broccoli. Squeeze grilled lemon half over each serving. Top with hot cheese sauce.