This Taco Dinner includes 12 of Jimboy’s pre-made signature ground beef tacos and 12 FREE Chicken Tacos, with a bottle of Jimboy’s signature salsa and taco sauce packets on the side.Back in 1954, Jim “Jimboy” Knudson developed a winning recipe: Jimboy’s proprietary seasoned ground beef, encased in a crispy stone-ground corn tortilla, topped with crisp lettuce and freshly shredded American cheese and finished with Jimboy’s signature dusting of parmesan cheese.