Once the veggies are in the oven, put a large pot of lightly salted water over high heat and bring to a boil.
In a large stainless steel or cast iron large skillet, dry roast the farro over high heat for 2-3 minutes, stirring often until the farro is slightly browned and releases a nutty, toasted fragrance.
Add farro to the salted water and simmer for 20-25 minutes so that the farro is cooked but still a little chewy - the desired texture.
Drain in a fine mesh strainer and put into a bowl.
When the veggies are done, toss them into the farro with the remaining 2 TBS of olive oil, 2 TBS fresh lemon juice and lemon zest, the chopped parsley, salt and pepper to taste.
Toss in the feta cheese.
Serve as a one bowl meal alone, over arugula, or with a side of your favorite protein.