Nachos with ultimate cheese sauce

Preheat the oven to 200 ° C. Spread the tortillas over the oven dish and heat in the middle of the oven for about 10 minutes.

In the meantime, cut the red onion and put in a bowl, squeeze the lime over the onion, mix and let stand until use. Scoop occasionally.

Cut the stalk of the jalapeño. Roll the pepper between your hands so that the seeds fall out. Cut the pepper into rings. Cut the coriander coarsely. Grate the cheddar.

Melt the butter in a large pan and add the flour. Bake for 3 minutes while stirring until the mixture starts to color light brown (roux).

Gradually add the milk on low heat and stirring with a whisk into a bonded sauce.

Add the cheddar and the old cheese, let it melt into a thick sauce while stirring.

Remove the tortillas from the oven and pour the cheese over them. Drain the onions and spread with the pepper and coriander over the cheese. Serve immediately.