In a large pot, add farro, garlic, a generous pinch of salt and cover with at least 3 cups of water. Cover with a tight-fitting lid and cook at a low boil for 15 minutes. Strain into a colander and rinse with cold water to stop the cooking.
In a large bowl, toss farro with remaining ingredients. Season to taste with salt and pepper. To store, seal tightly and refrigerate for a few days.