1. Heat oil over medium flame in a saucepan. Add Onion and sauté lightly till translucent. Add tomatoes and simmer about 5 minutes to cook down. 2. Add remaining ingredients and stir to mix well. Lightly mash the peas]] with a fork.. Simmer about 10 minutes over medium-low heat, stirring occasionally.. Add more water as needed to get a stew-like consistency.