Creamed Potatoes

Bahan-bahan (6 porsi)

• 2 pounds potatoes (peeled and chopped into 1" pieces)
• 3 tablespoons butter
• 1 ½ tablespoons all-purpose flour
• 1 ½ cups milk
• ¼ cup heavy whipping cream
• 1 teaspoon granulated sugar
• ¾ teaspoon salt
• ¼ teaspoon dried dill
• ¼ teaspoon black pepper
• 1 cup frozen peas (optional)