1 large head of broccoli, cut into small florets
5 c. chicken broth
3/4 pound peeled baby potatoes, cut into 1/4
1 pound boneless skinless chicken breasts
1 1/2 c. shredded Cheddar, plus more for garnish
1 c. heavy cream
Sour cream, for serving
kosher salt
1 onion, chopped
1/2 c. grated Parmesan
Freshly ground black pepper
1/4 c. flour