The quinoa should be cooked ahead of time and allowed to cool completely. If the quinoa is even the slightest bit warm, it will cook the parsley -- turning it brown -- when the salad ingredients are mixed together.
Cook the quinoa according to these instructions.
Allow to cool completely.
If desired, scoop servings of tabouli onto Romaine lettuce leaves and top with diced cucumbers and tomatoes.
Quinoa Tabouli https://traditionalcookingschool.com/food-preparation/recipes/quinoa-tabouli/