Flank Steak with Citrus Marinade

Adapted from http://www.primal-palate.com/2011/03/flank-steak-with-citrus-marinade.html

Ingredients (Serves 4)
    1 2 lb flank steak (or skirt steak)
    1 blood orange, juiced
    3 limes, juiced
    4 cloves of garlic, peeled and crushed
    1 Tbsp brown mustard
    1 Tbsp raspberry vinegar
    green onion, sliced (for garnish)

Instructions

1. Combine juice of orange and limes in a small bowl.
2. Add crushed garlic to marinade.
3. Whisk in brown mustard and blush vinegar.
4. Place flank steak in a 1-gallon Ziploc bag, add marinade, and refrigerate for 30 – 60 minutes.
5. Preheat grill on medium-high heat.
6. Grill flank steak for 6 – 7 minutes per side, turning once.
7. Serve thinly sliced over garlicky cauliflower mash.