If you’d like, lightly toast buns.
Bring a skillet sprayed with nonstick spray to medium-high heat. Cook onion until slightly browned, about 8 minutes.
Transfer onion to a bowl. Remove skillet from heat, re-spray, and return to medium-high heat. Add steak strips and, if you like, sprinkle with salt and pepper. Cook and stir for about 3 minutes, until just cooked through.
Divide steak strips into two portions in the skillet, and top each with a slice of cheese. Continue to cook until cheese has melted.
Transfer cheese-topped steak strips to the buns, and evenly top with onion. Enjoy!
Hungry Girl Alternative: Can't find 80-calorie light buns? Just get the lowest-calorie hot dog buns you see, and adjust the calorie count accordingly. Bonus points if they have fiber!
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