In a pan brown the ground turkey and diced onion. Add the garlic and cook until garlic is fragrent. Add the taco seasoning packet and add water (baed on instructions on seasoning pack).

In the middle of a tortilla, layer the ground turkey (or black beans), then the cheese sauce. Place a tostada shell down, then a layer of sour cream. On top of the sour cream layer the shredded lettuce, tomatoes, and shredded cheese.

Fold the edges of the tortilla inward to encapsulate the stuffing. In a hot pan, place the folded side down and cook until the tortilla is golden. Flip and cook until the other side is golden.