Preheat your oven to 425 degrees. Line a baking tray with foil and set aside.
Season your meat with salt and pepper. Set aside.
Heat the oil in a medium sauce pan. Stir in the onion and peppers. Cook 5 minutes or until the veggies begin to sweat.
Stir in your thinly sliced meat and continue to cook until meat is no longer pink. Remove from the heat and drain any liquid.
Lay out one egg roll wrapper. Lay half a slice of your preferred cheese and a large spoon full of your steak and veggie mixture. Wrap as tightly as you can and place on your baking tray. Continue until all of the filling is used.
Lightly spray both sides of your egg rolls with cooking spray. Bake 10-15 minutes, turning halfway through, until crisp on both sides.