01 - Preheat oven to 425°F.
02 - Place asparagus on a baking sheet. Drizzle with 1 tablespoon olive oil and season with salt and pepper. Toss to coat evenly.
03 - Roast asparagus for 12 to 15 minutes, stirring halfway through, until tender and slightly golden. Remove from oven and set aside.
04 - While asparagus roasts, bring 3 cups water and 1/2 teaspoon salt to a boil in a medium saucepan. Add farro, reduce heat to simmer, cover, and cook for 20 to 25 minutes until tender but chewy. Drain any excess water.
05 - In a large bowl, whisk together 1/4 cup olive oil, lemon juice, Dijon mustard, garlic, honey, salt, and pepper until emulsified.
06 - Add cooked farro, roasted asparagus, cherry tomatoes, and red onion to the bowl with dressing. Toss thoroughly to combine and coat evenly.
07 - Gently fold in arugula, allowing the residual heat from the grains to wilt it slightly.
08 - Transfer salad to a serving platter or individual bowls. Top with crumbled feta cheese, toasted pine nuts, and fresh parsley. Serve warm or at room temperature.