A la Mexicana is a term used to describe the way a dish is cooked, in a brothy sauce made of tomatoes, jalapeños and white onion, resembling the Mexican flag.
Heat the olive oil in a medium size skillet, add the garlic and saute for a moment. Season the chicken with salt & pepper and brown in the skillet along with the garlic.
When the chicken is evenly browned on both sides (approximately 8 minutes), add the rest of the ingredients and let it simmer for about 15 minutes.
When all the flavors are combined, serve with Spanish rice & warm tortillas.