Heat the oven broiler to high heat.
In a bowl, combine the Kaukauna® Cheese, shredded cheddar cheese, and sun-dried tomato. Set aside in the refrigerator.
Divide the meat into 8 portions. Take a portion, divide, and press onto a rimmed bake sheet to form 2 very thin patties (~3-inches wide; using the bake sheet makes this easy). Repeat with the rest of the meat. Season with salt and pepper.
Scoop ~1/2 Tbs of cheese filling onto a meat pattie. Take another pattie and lay on top. Press around the edges to seal. Gently pick up the stuffed burger and shape into a proper slider. Repeat to end up with 8 stuffed burgers.
Broil the burgers on the rimmed bake sheet 2-1/2 to 3-inches below the broiler, 4 minutes. Flip, and broil another 4 minutes. Remove from the oven.
Serve the Port Cheese Stuffed Sliders in little buns with lettuce, red onion, and BBQ sauce. Yields: 8 sliders.