Preheat Grill For Medium Heat And Lightly Oil The Grate. Whisk Orange Juice, Brown Sugar, Rice Vinegar, Soy Sauce, Chile Paste, Fish Sauce, And Garlic In A Large Bowl. Add Skirt Steak And Marinate For 15 Minutes. Cook Steaks On The Preheated Grill Until They Are Browned And Are Hot And Slightly Pink In The Center, About 4 Minutes Per Side. An Instant-Read Thermometer Inserted Into The Center Should Read 140 Degrees F (60 Degrees C).