1½ tablespoons olive oil

½ medium-sized yellow onion, chopped

2 scallions, thinly sliced, white and green parts separated

4 cups low-sodium chicken broth or vegetable broth

2 cups potatoes, washed well and diced (keep peel on)

1½ pounds cod, cut into 1-inch pieces

2 cups frozen sweet corn, thawed

1 cup skim milk

Dash of turmeric

¼ teaspoon red pepper flakes

Salt and ground black pepper, to taste