Beef curry

If you get some *good* beef, it is time to prepare some beef curry. ingredients goes like this:

Beef : 1/2 Kilo
Onion : 2 medium size
Tomato : 1 medium size
Potato :1 medium size
Green chilli : 2 medium size
Ginger garlic paste : 1 table spoon
Chilli powder : 1 table spoon
Turmeric powder : 1 table spoon
Corander powder : 1½ table spoon
Pepper powder :½ table spoon
curry leave :5-6
Salt : 1 table spoon.

Mustard seeds : 1 tea spoon
Coconut oil :2 table spoon.

Take ¼ teaspoon of turmeric powder and ¼ teaspoon of chilli powder and ¼ teaspoon of salt. mix it well and add meat to it. mix the meat with the mixture and marinate it well.
Cut the onions in to 2 halves and make slices. Cut the tomato and potato in similar way. cut green chilli into 2 pieces vertically.
Add marinated meat, sliced onion, tomato, potato and green chilli and curry leaves to a pressure cooker. Add 1½ glass of water. Add the remaining spices to it. Pressure cook it in medium flame for 15-20 minutes.
After the pressure cooker cools down, heat oil in a frying pan.
Add mustard seeds to the oil. after it stops spluttering, add the pressure cooked contents to it. let it cook under medium flame till the beef gets fully cooked.