Clean and soak the pearl barley for 2-3 hours.
Pressure cook in a pressure cooker with a bit of salt for 1 Whistle. (See Notes for cooking all in pressure cooker)
I used my Instant pot for pressure cooking for 2 mins.
Let the pressure cool off.
Remove the barley, drain and keep aside.
Now in a pan , add Oil
Once hot, add in the mustard seeds an cumin seeds.
Let them splutter.
Now add the curry leaves, onion and green chilly.
Let this saute for a few minutes until onion is translucent.
Now add the chopped tomatoes and green peas.
Add about 1/4 teaspoon of salt, turmeric and Red chilly.
Let this cook for 4-5 minutes, until the green peas are cooked.
Now add the red peppers and the cooked barley.
Mix everything and give it a quick gentle stir.
Let this cook for 2-3 minutes more.
Cover and let it rest for 5-10 minutes.
Serve it as is or with some yogurt on the side.