01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - Arrange zucchini, cherry tomatoes, and red onion on the prepared baking sheet. Drizzle with 1 tablespoon olive oil, season with salt and pepper, and toss to coat. Roast for 20 to 25 minutes, stirring halfway, until vegetables are tender and edges are lightly browned.
03 - Combine rinsed farro and 2 1/2 cups water or broth in a medium saucepan. Bring to a boil, reduce heat, cover, and simmer for 20 to 25 minutes until farro is tender. Drain any excess liquid.
04 - In a small bowl, whisk together remaining olive oil, lemon juice, minced garlic, oregano, salt, and black pepper until well blended.
05 - Transfer cooked farro to a large bowl and toss with baby spinach to wilt the leaves slightly. Add roasted vegetables and half of the dressing, tossing gently to combine.
06 - Divide the mixture among four bowls. Top each with crumbled feta, chopped parsley, mint if using, and drizzle with remaining dressing. Serve warm or at room temperature.