Sup Burger Keju Pemasak Lambat

Bahan-bahan (8 porsi)

• 1 pound daging giling tanpa lemak
• 4 cups kentang kupas dan potong dadu
• ¾ cup chopped onion, (about 1 medium onion)
• ¾ cup shredded carrots (about 1 ½ whole carrots)
• ¾ cup diced celery (about 1 ½ ribs)
• 1 teaspoon kemangi kering
• 1 teaspoon dried parsley flakes
• 4 tablespoons unsalted butter (divided)
• 3 cups kaldu ayam
• ¼ cup all-purpose flour
• 2 cups keju cheddar parut
• 1 ½ cups susu
• 1 teaspoon garam
• ¼ to ½ teaspoon pepper
• ¼ cup sour cream
• bawang hijau
• bacon bits