Summer Steak Flatbread

Directions

1. 1
   Place beef with cilantro marinade in 1-gallon resealable plastic bag. Squeeze out excess air and seal the bag. Marinate in the refrigerator for 1 hour 20 minutes.
2. 2
   Preheat grill to 250 to 300 degrees F (120 to 150 degrees C).
3. 3
   Combine onion, orange bell pepper, red bell pepper, yellow bell pepper, and margarine on a sheet of aluminum foil. Season with black pepper and seal vegetable packet.
4. 4
   Remove beef from the resealable bag. Place on a sheet of aluminum foil. Pour the remaining cilantro marinade on top. Seal the beef packet.
5. 5
   Place the vegetable and beef packets on the grill.
6. 6
   Grill vegetables until softened, 30 to 35 minutes. Grill beef until it begins to firm and is hot and slightly pink in the center, 30 to 40 minutes. An instant-read thermometer inserted into the center should read 140 degrees F (60 degrees C).
7. 7
   Grill flatbreads until warm and toasted, 5 to 8 minutes.
8. 8
   Arrange vegetables, beef, salsa, and sour cream on each of the flatbreads and serve.