Turkey — good for you, right? Of course. But then turkey, dry as toast in a burger sometimes, is also right. So the addition of the fried egg and softened onions keep that from happening. It's delicious and you still feel good about yourself.
Heat a nonstick skillet to medium, add the olive oil and the onions — cook, stirring until nicely caramelized, about 10 minutes.
In a bowl, mix the turkey with the seasoning and 1 tablespoon of the barbecue sauce. Separate the turkey mixture into 4 equal portions and form into patties.
Preheat the grill to medium-high.
Grill the burgers until nicely charred on both sides and cooked through, 4 to 6 minutes a side.
In a nonstick pan over medium heat, cook the eggs in the butter — I like to go over-easy cuz there's just something about the yolk running down through the onions, burger, etc.
Meanwhile, grill the muffins until toasty. Top each bottom with a burger, onions, a fried egg, then the top of the bun.
*Btw: If it isn't obvious, a fried egg can always be added to any burger (and should).
*Btw: I realize turkey and steak seasoning may seem a bit...contradictory. But the turkey won't mind, and neither will you.