Combine cumin, coriander, salt and pepper in a bowl. Sprinkle onto your steak. Add minced garlic and approximately 1 tbsp olive oil and rub everything onto the steaks. Let sit and marinate in fridge until ready to grill (at least 30 minutes).
Mix up your chimichurri by blending together 1/2 cup olive oil, parsley, lemon juice, oregano, garlic and salt/pepper. Blend until combined and set aside.
Grill your steak to your liking and serve with chimichurri sauce.