Add the oil to your oven-safe skillet and preheat it on stove-top, on medium heat.
Coat the chicken tenders in the seasoning mix, evenly. Cook it on medium heat, flipping half way through, until golden brown and completely cooked.
Take out the chicken and place it on the cutting board to cool down, so it can easily be handled.
Beat the cream cheese, sour cream, and mayo until evenly combined and smooth.
Add the chopped green onions, cooked chopped chicken, shredded cheese and the remaining 1/2 packet of the ranch seasoning mix. Mix very well using a spatula, until all evenly combined.
Preheat the oven to 375.
Make sure that there is enough oil remaining in the skillet. If not, add about 1/2 more tablespoon and make sure that it's distributed all over the skillet and on the sides.
Transfer the dip mixture into the skillet and spread it evenly. Top off with 1 cup of shredded cheese evenly.
Bake for about 15 minutes, until cheese on top starts to bubble. If you want the cheese to be a little more golden, turn on the broiler for 50-60 seconds. (Make sure that your rack is not in the top position and if it is, broil for much less time.)