Whisk together soy sauce, mirin, scallions, chili sauce, minced garlic, ginger, orange zest, and orange juice in a medium bowl until well combined. Place your favorite cut of meat (we recommend shrimp, swordfish steaks,or boneless, skinless chicken thighs) in a large ziplock plastic freezer bag. Pour marinade over meat. Seal bag, and massage marinade into meat. Chill. (See "Marinade Basics," below, for guidelines.) Remove meat from marinade, and cook as desired.