
Brown beef in a skillet over medium-high heat 7-8 minutes. Drain, then stir in chili powder, cumin, salt and 1/4 cup water; simmer 2 minutes.
Lay out 4 tortillas. Spoon beef in the center of each, drizzle with cheese sauce, and top with a tostada shell.
Spread sour cream on the shell, then add lettuce, diced tomato and shredded cheese. Cut the last 2 tortillas into quarters and lay a piece over the center of each to cover the opening.
Fold the edges of the big tortilla up and over in pleats to make a sealed hexagon.
Cook seam-side down in a lightly oiled skillet over medium heat 2-3 minutes per side until golden and crisp. Cut in half to serve.
Photo: DinnerDrop