5In a pot with olive oil on medium heat, fry smashed onions, then add carrot and celery and cook them for a while.
6Add beef and cook until brown.
7Add salt and pepper.
8Add white wine.
9Add liquid tomatoes.
10Simmer with occasional stirring until hungry, then order pizza.
11Make béchamel sauce: Melt butter in a saucepan, add flour and whisk until combined, then add milk gradually while whisking until smooth. Add nutmeg and pepper.
12Shred Oaxaca cheese.
13Spread a layer of tortilla chips on a parchment-papered pan. Add a layer of Oaxaca cheese, bolognese sauce, and béchamel sauce. Repeat layers.
14Bake in the oven until cheese is bubbly and brown.