
Sprinkle the remaining 1 cup Monterey Jack and 1 cup pepper jack over the top. Repeat the layers, ending with the corn mixture. Layer with half of the macaroni mixture, then half the corn mixture. Butter a 9-by-13-inch disposable foil pan.Add the cooked macaroni and stir to coat. Add the processed cheese, 1 cup of the Monterey Jack and 1 cup of the pepper jack and continue to cook, stirring, until the cheese all melts. Cook the white sauce until thick and bubbly, 3 to 5 minutes. Pour in the milk, whisking constantly, followed by 2 teaspoons salt and 1 teaspoon pepper. Let the roux cook for a minute or so, whisking constantly. Sprinkle in the flour, whisking to combine. To make the sauce, melt the butter in a large pot over medium heat.Cook, stirring, until the onion turns golden brown and the corn begins to blister, 4 to 5 minutes.

Add the red onion and corn and season with salt and pepper.

Serve immediately (while it's still very creamy) or pour into a buttered baking dish, top with extra cheese and bake until bubbly and golden on top, 20 to 25 minutes. Pour in the drained, cooked macaroni and stir to combine.Taste the sauce and add more salt and seasoned salt as needed! DO NOT UNDERSALT. Add 1/2 teaspoon salt, 1/2 teaspoon seasoned salt and the pepper. Pour the egg into the sauce, whisking constantly. Take 1/4 cup of the sauce and slowly pour it into the beaten egg, whisking constantly to avoid cooking the eggs.Pour in the milk, add the mustard and whisk until smooth. Cook for a couple of minutes, whisking constantly. In a large pot, melt the butter and sprinkle in the flour. Cook the macaroni until still slightly firm.Top each serving with some sour cream and salsa if desired.

Taste and adjust the seasoning, thinning with a splash of milk if needed. Pour in the cooked pasta, add the taco meat and stir to combine. Add the processed cheese and cook, stirring, until melted.
