Set oven to 350º. Shred the chicken up and heat olive oil in a sauté pan on medium high heat. Add onions, sauté for about 3 minutes then add garlic, seasoning, cooked chicken, green chilis.
Bring to a low simmer, add the sour cream. Add half of the cheese, save the other half for the top. Mix in. Move the chicken mixture to a bowl off to the side.
Prepare the tortillas. Dampen two paper towels well, wrap them around the tortillas and microwave them for 45-60 seconds, this will help keep the tortillas from cracking without having to deep fry them.
Make the enchiladas. Add the enchilada sauce or salsa verde to the same skillet the chicken mixture was in. bring it to a very low simmer
Working quickly, dip the warmed tortillas into the warmed salsa in the skillet, add about 4 Tbsp of chicken mix to the tortilla. Roll it up and add to an oiled and sauced baking dish.
Bake the enchiladas. Continue this step until the baking dish is filled. Pour the leftover salsa verde from the skillet over the enchiladas and add the rest of the cheese. Bake for about 25-30 minutes or until cheese has fully melted and is bubbling well. Add toppings of choice (jalapeño, cilantro etc.) and serve!