Preheat the oven to 400°F
Place the silpat on the sheet pan and set aside
Combine all ingredients in a large bowl and toss until well coated
Spread ingredients on the sheet pan in a layer and roast 15-20 minutes until steak is done to your preference
When serving lay out fajitas on Siete tortillas or romaine lettuce leaves, garnish, roll or fold, and enjoy!