Prep Time::20 mins
Cook Time::40 mins
Stand Time::5 mins
Total Time:: 1 hr 5 mins
Servings::8
Ingredients
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1 lb. lean ground beef
1 cup chopped onion
1 package Taco seasoning
1/3 cup water
3 tablespoons butter, melted, divided
6 (10-inch) flour tortillas
2 cups shredded Cheddar cheese
1/2 cup chopped cilantro (optional)
3 medium ripe tomatoes, seeded, diced, and drained on paper towels
8 oz. sour cream, plus more for serving
8 tostada shells
1 (15 oz.) can nacho cheese
1/2 cup shredded lettuce, or to taste
2 tablespoons guacamole, or to taste
1 teaspoon hot sauce, or to taste (optional)
Directions
Gather the ingredients. Preheat the oven to 375 degrees F (190 degrees C).
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Heat a large skillet over medium-high heat. Add ground beef and cook for 2 minutes, crumbling with a wooden spoon and stirring constantly. Add onion and cook, stirring often, until meat is browned and onion has softened, about 5 minutes. Season with taco seasoning and stir to coat the meat mixture.
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Pour in water and cook for 2 minutes, stirring constantly and scraping up any browned bits from the bottom. Remove from heat and set aside.
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Brush melted butter lightly to coat a 9×13 baking dish. Arrange 5 tortillas along the edges and bottom of the pan, allowing any excess to hang over the sides and overlapping to completely cover the pan. Spread shredded cheese over the tortillas. Top evenly first with cilantro and then tomatoes. Spoon sour cream into a plastic bag and and squeeze over the tomatoes.
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Arrange tostada shells over the sour cream overlapping them to make them fit. Spread nacho cheese sauce over tostadas.
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Pour cooked beef mixture over cheese sauce and spread into an even layer.
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Place remaining tortilla on the center of the beef mixture. Wrap the over-hanging tortillas around over the top tortilla.
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Brush casserole with the remaining butter and press down any loose ends.
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Bake in the preheated oven until golden brown and lightly toasted, about 30 minutes.
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Let stand for 5 minutes and then carefully invert casserole onto a serving board or cutting board.
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Using a large serrated knife, cut the casserole into desired servings. Top with shredded lettuce, more sour cream or guacamole, and hot sauce if desired.
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