Heat oil in a heavy-bottomed kadai over medium heat, add mustard seeds, let it splutter.
Once it splutters, add chana dal, urad dal, raw peanuts, and cashew nuts. Saute over medium-low heat, until the lentils and nuts turn a light golden color.
Add curry leaves, green chillies, ginger, garlic, and hing. Saute until the ginger-garlic is fragrant.
Add finely chopped onions, saute until onions turn translucent.
Add diced tomatoes, salt, cook until it turns mushy.
Add turmeric, Kashmiri chili powder, and sugar. Mix well and saute for another 30 seconds.
Add water, mix well and bring to a boil.
Add the bread cubes.
Toss until the bread cubes are well coated with the masala. Cover the kadai and simmer on low heat for 2-3 minutes.
If it looks too dry, sprinkle some water, and mix gently.
Switch off the heat and add coriander leaves and 1/2 tablespoon of lemon juice, mix gently. Serve hot!