01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - Toss the pitted and halved cherries with olive oil and black pepper. Spread evenly on the prepared baking sheet. Roast for 12–15 minutes until softened and slightly caramelized. Remove from oven and set aside to cool.
03 - While the cherries roast, rinse farro under cold water. Combine farro, water, and salt in a medium saucepan and bring to a boil. Reduce heat to low, cover, and simmer for 25–30 minutes until grains are tender. Drain any excess liquid and let cool to room temperature.
04 - In a small bowl, whisk together extra-virgin olive oil, fresh lemon juice, honey or maple syrup, Dijon mustard, salt, and black pepper until emulsified and smooth.
05 - In a large salad bowl, combine the cooled farro, roasted cherries, cherry tomatoes, red onion, torn basil leaves, crumbled feta cheese if using, and chopped walnuts. Drizzle the dressing over the top and toss gently until evenly coated.
06 - Serve immediately at room temperature, or refrigerate for 30 minutes to allow the flavors to meld before serving.