Peel breadfruit and cube them. Take them in a pot along with onions, salt, turmeric powder and 1 cup of water. Cover and cook on a low heat for 15 mins till it is cooked. Now the water would be reduced as well.
Heat oil in a kadai, add all the roasting ingredients and roast till golden. Remove it to a blender and make it into a smooth puree. Set aside.
When the bread fruit is cooked, add the masala in along with red chilli powder and water and mix well.
Simmer this for 5 to 10 mins.
Now make seasoning by heating some oil in a kadai. Add in mustard and curry leaves. Let them sizzle.