Sup Sayuran Merah ala Shanghai (罗宋汤 - Luo Song Tang)

Bahan-bahan (8 porsi)

• 2 pounds buntut sapi
• 2 tablespoons minyak sayur
• 2 bawang besar
• 6 cloves bawang putih
• 3 small tomatoes ((about 12 ounces/340g, roughly chopped))
• 2 tablespoons pasta tomat
• 10 cups water ((2.4L))
• 2 large carrots ((about 12 ounces/340g, cut into large chunks))
• ¼ cabbage ((about 12 ounces, roughly chopped))
• 5 bay leaves
• 2 teaspoons garam
• 1 teaspoon lada hitam
• 1 pound kentang ((450g, sekitar 2 kentang besar, kupas dan potong besar))