Farro Salad with Slow-Roasted Tomatoes, Arugula and Peas

We were in SoCal for a week, visiting family, and my mom hosted a little birthday party to celebrate Xander’s 5th the day we arrived. We ordered pizza, as we often do these days for these on-the-fly family gatherings, to keep it simple. My contribution, as usual, would be some sort of big salad – but this time, one that could be prepared a few hours in advance…