Take the chicken out of the refrigerator half an hour before cooking to allow it to come to room temperature.
Clean the bell peppers under cold water and peel the onion.
Slice the sweet onion, red bell pepper, and green bell pepper.
Remove the chicken from its packaging and pat it dry with a paper towel.
Place the breasts on a cutting board and cover with plastic wrap. Gently pound the breasts flat to about ½ inch thickness.
Slice the chicken breast into thin 1” slices lengthwise, set aside until needed.
Place a Dutch oven or large skillet over medium heat. When the pan is hot, add half of the butter (2 tablespoons) to the pan, stirring the butter around the pan to melt.
Add the onions and bell peppers to the pan and cook over medium heat for 3-4 minutes, stirring periodically.
Remove the peppers and onions from the pan and place them on a clean plate, and tent loosely with aluminum foil.
Add the chicken strips to the pan.
Add the salt, black pepper, paprika, oregano, cumin, sugar, and cayenne pepper (optional) to the pan. Stir to combine
Cook the chicken over medium heat for 4-6 minutes. Or until the internal temperature of the chicken reaches 165 degrees F.
Add the garlic to the pan, and stir together to combine. Cook for 1-2 minutes until the garlic becomes fragrant.
Add the peppers and onions back into the pan. Stir to combine.
Add the remaining two tablespoons of butter to the pan. Stir until the butter has melted.
Add the cooked pasta to the pan, and stir to combine.
Reduce the temperature to low and add the cotija cheese, sharp cheddar cheese, and sour cream to the mixture. Stir until the cheese has melted and all of the pasta is well coated with the sauce.*For a creamier sauce, add ¼ cup of heavy cream or milk to the mixture. Remove the pan from the heat. Place the pasta on a serving dish and serve.
Garnish with chopped parsley and cojita cheese.