Place the farro, 3 cups water and a pinch of salt in a medium saucepan and bring to a boil. Reduce to a simmer and cook until tender, about 30 minutes. Drain the farro and set aside.
Heat a grill pan over medium high heat and spray with cooking spray. Season the shrimp with a pinch of salt and pepper and add them to the grill. Cook about 3 minutes on each side until opaque. Remove from grill.
To make the dressing, whisk the lemon juice, mustard, maple syrup, and olive oil together in a bowl. Season the dressing with a pinch of salt and pepper.
To assemble the salad, toss the cooked farro, salad greens, blueberries, and beets together in a large bowl with the dressing. Top the salad with the grilled shrimp, feta, and pecans.