Copycat Crunchwrap Supreme

Bahan-bahan (4 porsi)

• 5 large flour tortillas (10-inch)
• 1 pound lean ground beef
• ⅓ cup water
• 1 ounce taco seasoning (1 packet, about 2 tablespoons)
• ⅔ cup nacho cheese sauce
• 4 tostada shells (or 2 cups tortilla chips)
• ⅔ cup sour cream
• 1 cup shredded iceberg lettuce
• 1 cup diced fresh tomatoes
• 2 cups shredded Mexican cheese blend