Easy 15 -minute Sheet Pan Fajitas

0 Cut the flank steak in the desired size, thin or thick strips.
1 Combine all the spices listed in a small bowl and set aside.
2 Slice (julienne) the onions and peppers in strips.
3 Prepare a baking sheet with parchment paper and cooking spray. 
4 Place the stripped beef, onions and peppers onto the baking sheet
5 Drizzle olive oil allover, then sprinkle the spice mix all over as well. 
6 Combine well using hands or tongs. 
7 Preheat oven to 350F.
8 Bake for 13-15 minutes, then broil for 2 minutes on high.
9 Enjoy on a warm tortilla with guacamole or salsa. You can also add some cheese, sour cream, and chopped lettuce.