The Half Slab of Ribs Dinner at Portillo’s is delicious, slow-cooked pork ribs covered in a thick, smokey BBQ sauce. These ribs are cooked until they are juicy and tasty, and every bite has the perfect mix of sweet and salty flavors. It usually comes with standard sides like crinkle-cut fries and coleslaw or baked beans, making it a filling meal for BBQ fans.