Prepare the Béchamel sauce: melt butter in a pan, stir in flour until well combined, then gradually add warm milk while continuously stirring until the sauce thickens.
2
Season the Béchamel sauce with minced garlic, mustard, and ground black pepper, then adjust salt to taste.
3
Lay out the chicken breast and place ham and cheese in the center, seasoning with black pepper and salt.
4
Roll the chicken breast starting from one end and secure with toothpicks.
5
Beat the eggs in a bowl with black pepper, salt, and mustard until well combined.
6
Set up three shallow dishes with flour, egg mixture, and breadcrumbs respectively. Coat each chicken roll first in flour, then dip in egg, and finally roll in breadcrumbs.
7
Heat oil in a pan and fry the breaded chicken rolls until one side turns golden brown.
8
Flip the chicken rolls and continue frying until the other side is golden brown and cooked through.
9
Plate the fried chicken rolls and drizzle with the prepared Béchamel sauce. Serve with nopal salad if desired.