Get your oven hot to 425°F (220°C).
In a medium pan, brown the lean ground beef over medium-high heat until cooked through. Drain any excess fat for a healthier meal.
Add the diced onion to the pan and cook for 3-4 minutes until it's soft and clear.
Stir in the taco seasoning and water. Bring the mixture to a gentle simmer and let it cook for 6-8 minutes, or until all the liquid has evaporated, creating a flavorful beef filling.
Lightly grease a large baking sheet with cooking spray.
Take one tortilla and spoon about 3 tablespoons of the beef mixture down the center.
Roll it up tightly and place it seam-side down on your prepared baking sheet.
Repeat with the remaining tortillas and beef filling until all flautas are assembled.
Lightly spray or brush the tops of all the rolled flautas with olive oil for extra crispiness without frying.
Bake for 10 minutes, then carefully flip them over and bake for another 5 minutes, until they are golden brown and perfectly crispy.
While your flautas are baking, get ready to make the delicious queso dip! In a medium saucepan, combine the undrained Ro*Tel tomatoes and the cubed Velveeta.
Cook over medium heat for about 5 minutes, stirring frequently, until the Velveeta has completely melted and the dip is smooth and creamy.
Serve your perfectly baked flautas immediately with the warm, cheesy queso dip for a fantastic meal!