Heat 10-12 inch cast iron skillet over medium high heat.
Add Olive Oil and wait until it sizzles.
Using your fingers, rip small pieces of turkey from package and add them in a single layer to a large heavy skillet.
Brown the turkey, until no longer pink.
Reduce the heat to medium low.
Add butter to skillet and allow to melt.
Sprinkle half of the flour over turkey and mix in until well combined. Add more, a little at a time until all the flour has been incorporated into the turkey.
Continuing stirring for another minutes and them slowly pour in 3 cups or more of milk.
Cook the gravy, stirring frequently, until it thickens, about 10 to 12 minutes adding more milk, if needed.
Sprinkle sage, seasoned salt and pepper over turkey and continue cooking until thick.