Cook the turkey tenderloin:
Preheat your air fryer to 370°F. Place the turkey tenderloin in the basket and cook for 20–25 minutes, flipping halfway through, until the internal temperature reaches 165°F. Let it rest for a few minutes before slicing. The air fryer gives it that perfect golden crust without drying it out.

Make the green bean casserole:
In a small baking dish or oven-safe pan, combine the green beans, cream of mushroom soup, and half of the French fried onions. Air fry (or bake in a toaster oven) at 350°F for about 10 minutes, then sprinkle the remaining onions on top and cook another 2–3 minutes until crispy.

Prepare the mashed potatoes:
While everything cooks, boil water and make your instant mashed potatoes according to the package directions. Stir in a pat of butter or a splash of milk for extra creaminess.

Add the finishing touches:
Slice the turkey and serve it with mashed potatoes, a scoop of green bean casserole, and a spoonful of cranberry sauce on the side.