A lot of Mexican cuisine has Spanish origins since they colonized Mexico.

In this specific example this style of migas is a Mexican inspired dish.

The way my mother makes migas is normally just corn tortillas and eggs. That's the more classic dish. It's a way to use stale/old tortillas. You can shallow fry the cut tortillas or pan fry them with a little oil until golden brown and cripsy.

This one seems to be "Huevos a la Mexicana" turned into migas topped with cheese. The variations with cheese is a younger generation/newer version.

Edit: Just in case someone wants to try these other options.