Broccoli Cheese and Potato Soup

Ingredients

• 1 teaspoon freshly ground black pepper
• 3 cups whole milk
• ½ teaspoon kosher salt
• 2 tablespoons flour
• 6 cups broccoli florets
• 1 tablespoon butter
• 4 cups chicken broth
• 1 medium yellow onion, chopped
• 3 cups shredded medium cheddar cheese
• 3 large white potatoes, cubed, about 4 cups