2Add in one packet of taco seasoning with water and cook until sauce has thickened.
3To a flour tortilla add shredded cheese, ground beef, top with a tostada, spread on sour cream, shredded iceberg lettuce, diced tomatoes, salt and pepper and more shredded cheese.
4Cut another flour tortilla into quarters and place on top.
5Fold the tortilla sides up and towards the center, folding the next piece slightly over the last.
6Grill folded side down on medium low heat for two minutes on each side until you have a golden and crispy crust.