Fiesta Chicken Enchiladas

2 (10 ounce) cans mild enchilada sauce (I use one of the green sauce and one red sauce) 2 cups chopped cooked chicken, you can buy the already chicken in the[...]

2 tablespoons extra virgin olive oil 1 large onion , finely diced 1 jalapeno, minced 3 fresh garlic cloves , minced 10 ounces baby spinach leaves, chopped 4[...]