Note: This recipe is especially for kids on a gluten-free diet, who must avoid foods that contain gluten, a type of protein found in many foods. This gluten-free dish is a great source of iron and protein. The longer you marinate the steak, the better it tastes. Prep time: 45 minutes What you need: 1-1/4 pound lean flank steak, fat trimmed 5 garlic cloves, minced 2 tablespoons ginger root, chopped 1/3 cup vinegar 2 tablespoons wheat-free soy sauce, light 1/2 cup onions, chopped and divided 3 cups watercress, cleaned and trimmed 1 medium carrot, grated 1/4 cup water red pepper flakes (optional) What to do: Place flank steak in a shallow glass dish. Combine garlic, ginger, vinegar, soy sauce, red pepper (optional), and ¼ cup onions in a food processor. Blend until smooth. Pour half the marinade over the steak. Turn steak to coat both sides. Cover and refrigerate for at least 30 minutes. Store the remaining marinade in the refrigerator. Grill the steak on each side for 5 to 7 minutes for medium rare (145°F on a meat thermometer). Place remaining marinade into a small saucepan and add ¼ cup water. Simmer over low heat and cook for 3 to 4 minutes. In a large bowl, toss watercress, remaining onions, and carrots with warm marinade. Slice steak into thin strips and serve steak slices on salad. Nutritional analysis (per serving): 219 calories 26g protein 10g fat 4g sat. fat 6g carbohydrate 1g fiber 67mg cholesterol 315mg sodium 46mg calcium 2.1mg iron Serves: 5 Serving size: approximately 3.5 oz. steak and 1/5 of salad Note: Nutritional analysis may vary depending on ingredient brands used. Variations and suggestions: If you don't have watercress, try fresh spinach. Serve with rice. Back to Articles Related Articles About Recipes for Teens With Celiac Disease These recipes are especially for kids who need a gluten-free diet. Kids who need a gluten-free diet must avoid foods that contain gluten, which is a type of protein found in many foods. Read More About Recipes for Kids With Celiac Disease These recipes are especially for kids who need a gluten-free diet. Kids who need a gluten-free diet must avoid foods that contain gluten, which is a type of protein found in many foods. Read More Failure to Thrive Most kids grow well but some have ”failure to thrive.” This means they don't gain weight as expected and may not grow as tall as they should. Read More Celiac Disease People who have celiac disease, a disorder that makes their bodies react to gluten, can't eat certain kinds of foods. Find out more - including what foods are safe and where to find them. Read More Celiac Disease Kids who have celiac disease, a disorder that makes their bodies react to gluten, can't eat certain kinds of foods. Find out more - including what foods are safe and where to find them. Read More Celiac Disease People with celiac disease can't eat gluten, which is found in many everyday foods, such as bread. Find out more by reading this article for kids. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.