2 T olive oil
1 small red onion, thinly sliced
3 cloves garlic, finely chopped
3 T ginger grated fresh ginger
2 boxes (32-oz ea) low-sodium chicken broth
2 medium parsnips, peeled and chopped
2 medium carrots, peeled and chopped
2 stalks celery, thinly sliced
1 medium turnip, peeled and chopped (1 1/2 C)
1/2 tsp Kosher salt
1 (2- to 2 1/2 lb) rotisserie chicken
1/2 C frozen peas
4 scallions, sliced
4 biscuits, store-bought or made from a mix (optional)