Stuffed Peppers

Here is an indian stuffed pepper recipe:
You need:
2 red and 2 green peppers (large)
5 Tbsp oil
1 onion, finely chopped
2 tsp ground coriander
1 tsp ground cumin
1/2 tsp cayenne pepper (or to taste)
350 gr of ground beef
3 Tbsp rice
1 can (400 gr) tomatoes, keep the liquid
salt
Heat 3 Tbsp of oil in a frying pan, fry the onion until golden. Add
spices and cook 2 minutes. Add the gound beef and cook well. Add the rice
and the salt and cook 2 minutes.
Cut the top of each pepper, remove the seeds and the ribs inside.
Fill them with the beef mixture.
Select a large sauce pan, big enough to fit the four peppers standing up.
Put the last 2 Tbsp of oil in the pot, fit the peppers, add the tomatoes
around and pour the tomato juice into each pepper.
Cover the pot, bring to boil and simmer for 40 minutes.