ingredients 3 medium (1 lb. 5 oz. total) ears fresh shucked yellow corn 2 tablespoons unsalted butter 1/2 cup chopped yellow onion (from 1 small onion) 2 garlic cloves, chopped (about 2 tsp.) 1 3/4 cups lower-sodium chicken broth 10 ounces (6 medium) baby red potatoes, cut into 1/2-i