Farro Salad with Peas and Feta

Name: Farro Salad with Peas and Feta
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: American
Ingredients: 1/4 cup olive oil; 2 tablespoons lemon juice ((from 1 lemon)); 1 clove garlic (minced); 1/4 teaspoon Dijon mustard; 1/4 teaspoon minced fresh thyme; Salt and freshly ground black pepper; 1 tablespoon olive oil; 2 cups farro (semi-pearled or pearled (see note 1)); 3 1/2 cups water; 1 cup frozen peas (thawed); 3 cups arugula ((about 3 1/2 ounces)); 3 tablespoons minced fresh dill; 4 ounces crumbled feta cheese (for serving)