Soak dried peas overnight in enough water. (i.e; if you want to make in the morning, soak night, if you want to make in the night, soak in the morning).
Pressure cook directly in a small cooker with a cup of water for 2 whistles.
Meanwhile peel garlic and grind it with ginger, pepper and jeera along with very little water if needed.
Make sure you use a very small piece of ginger.
Transfer the cooked peas to another vessel and in the same pressure cooker, add oil and finely chopped onion and fry till transparent.
Add the ground ginger garlic paste and fry till raw smell goes away. Do it in medium flame.
Then add finely chopped tomatoes, turmeric, sambar powder and salt.
Fry till it becomes mushy. Add the cooked peas, add a cup of water and mix well.
Pressure cook for another whistle in medium flame.
You can simmer for 15 minutes as well instead of again pressure cooking. Water quantity may vary.
Garnish with chopped coriander leaves generously.