Creamed Corn with Cheese and Cilantro

INGREDIENTS

3 tbsp

unsalted butter

1 1/2 cups

chopped scallions* about 6 large or one bunch or green onions

8 cups

corn 8-9 cups frozen corn see notes for fresh corn on cob

2/3 cup

heavy cream

2 tsp

cornstarch

1 clove

garlic, minced

1 cup

grated sharp white or yellow cheddar

1 cup

grated or shaved Parmesan cheese, divided

1 cup

fresh parsley, chopped