I'm not sure if this is considered Mexican, but it is amazingly delicious either way! The recipe is from my friend, Rosie Pacini.
3 yellow onions, chopped
2 Tbs. olive oil, plus extra for chicken
4 cloves garlic
4 bell peppers (any color), cored, seeded, and large-diced
1 tsp. chili powder
1 tsp. ground cumin
1/4 tsp. dried red pepper flakes
1/4 tsp. cayenne pepper, or to taste
2 tsp. kosher salt, plus more for chicken
2 28-oz. cans whole peeled tomatoes in puree, undrained
1/4 c. fresh basil leaves, minced
4 chicken breasts
for serving: chopped onions, corn chips, grated cheese, sour cream
Cook the onions in the oil over medium-low heat for 10-15 minutes, until translucent. Add the garlic and cook for 1 more minute. Add the bell peppers, chili powder, cumin, red pepper flakes, cayenne, and salt. Cook for 1 minute.
Put the tomatoes in the food processor for a few pulses and then add them. Add the basil. Bring to a boil, then reduce the heat and simmer, uncovered, for 30 minutes, stirring occasionally.
Preheat the oven to 350 degrees.
Rub the chicken breasts with olive oil and put on a baking sheet. Sprinkle with salt and pepper. Roast the chicken. Let cool slightly. Cut chicken into chunks and add to the chili. Simmer, uncovered, for another 20 minutes.