Combine olive oil, lime juice, orange juice, cilantro, garlic, cumin, chili, salt and pepper in a bowl or mason jar. If using a bowl, whisk together until fully incorporated. If using a mason jar, secure the lid and shake for 15 – 20 seconds.

Add steak to a large plastic bag, cover with marinade, and seal bag. Refrigerate at least 4 hours, and up to 24 hours. 

Outdoor Grill: heat grill to medium-high and lightly oil grate. Cook until desired doneness – about 7 minutes per side for medium rare.

Indoor Grill: Heat grill pan to medium-high. Add olive oil to pan then cook steak until desired doneness – 10 minutes per side for medium rare.

Let it rest for 5 minutes, then slice against the grain.