01 -
Heat 15 ml olive oil in a large pot over medium heat. Add diced onion; cook for 5-7 minutes, stirring until softened and translucent.
02 -
Incorporate 450g ground beef with the sautéed onions and taco seasoning. Break apart the beef and cook for 10-12 minutes until thoroughly browned. Transfer the cooked beef mixture to a separate bowl, reserving drippings in the pot.
03 -
Melt 60g butter in the reserved drippings over medium-low heat. Whisk in 30g all-purpose flour for 2 minutes to create a roux. Gradually add 480 ml milk, whisking continuously to prevent lumps, until the mixture thickens slightly (approximately 3 minutes). Stir in 2 (280g) cans of undrained Rotel tomatoes and green chilies. Incorporate 240g shredded cheddar cheese until melted and smooth. Finish by stirring in 60g sour cream, hot sauce to taste, and a pinch of taco seasoning until well combined.
04 -
Return the browned beef and onion mixture to the cheese sauce. Stir thoroughly to combine. Simmer uncovered on low heat for 10 minutes, stirring occasionally, allowing the mixture to thicken.
05 -
Arrange 12 nacho cheese taco shells on a baking tray. Bake at 175°C (350°F) for 5 minutes until crisp.
06 -
Fill each crisped taco shell with a generous portion of the cheesy beef mixture. Serve immediately, accompanied by Spanish rice (optional) or preferred garnishes.