01 - Toast the rinsed farro in a dry saucepan over medium heat for 3-4 minutes, stirring constantly until fragrant and lightly golden.
02 - Add 2 cups water and 1/2 teaspoon salt. Bring to a boil, then reduce heat to low and simmer uncovered for 20-25 minutes until farro is tender but still chewy. Drain any excess water and let cool slightly.
03 - In a large salad bowl, combine halved cherry tomatoes, diced cucumber, chopped red onion, arugula or spinach, and fresh parsley.
04 - In a small bowl, whisk together olive oil, lemon juice, Dijon mustard, minced garlic, black pepper, and salt until emulsified.
05 - Add cooled farro to the salad bowl, pour the dressing over, and toss thoroughly to coat all ingredients evenly.
06 - Gently fold in toasted walnuts or almonds and crumbled feta cheese if using. Taste and adjust seasoning as needed.
07 - Serve at room temperature or chilled. Pairs well with crisp white wine such as Sauvignon Blanc.