Sour Fried Beef

• beef—take the meat and trim off all the tough part (gristle or tendons) and slice it into three pieces 1 cm thick
• ground black pepper—sprinkle it on the pieces of meat and put them on a plate

Heat 2 tablespoons of butter in a sauté pan (maw kan noi). When the butter is hot, put the large onion, which has been sliced, into it. Fry until it smells good. Open the can of tomato paste and put its contents into the pot. Keep frying until the mixture gives off a good aro