Preheat your oven to 425°F (220°C).
Rinse the farro under cold water and drain. In a medium saucepan, combine the farro and water. Bring to a boil, reduce heat to low, cover, and simmer for 25-30 minutes until the farro is tender and the water is absorbed.
While the farro cooks, prepare the vegetables. Place the zucchini, bell pepper, eggplant, red onion, and cherry tomatoes on a large baking sheet. Drizzle with 2 tablespoons of olive oil, and sprinkle with 1/2 teaspoon of salt and 1/4 teaspoon of black pepper. Toss to coat evenly.
Roast the vegetables in the preheated oven for 20-25 minutes, stirring halfway through, until they are tender and have a nice char.
In a small bowl, whisk together the remaining 2 tablespoons of olive oil, balsamic vinegar, minced garlic, remaining 1/2 teaspoon of salt, and remaining 1/4 teaspoon of black pepper to create the dressing.
In a large bowl, combine the cooked farro, roasted vegetables, and fresh basil. Pour the dressing over the salad and toss to combine.
Top the salad with crumbled feta cheese and toasted pine nuts before serving.