Combine water and farro in a medium saucepan. Bring to a boil and reduce heat to medium. Cover partially; simmer until tender (20 minutes for farro, 45 minutes for wheatberries). Drain well.
Whisk oil and vinegar in a large bowl. Season with salt and toss with farro. Cool.
Cook favas in boiling salted water for about 5 minutes. Add peas and cook 1 more minute. Cool in ice water and drain. Pull the little beanskins off and toss everything together.
YUM!