Heat oil ion a heavy skillet over medium heat. Add turmeric, cumin and mustard seeds and stir until mixture crackles(4 minutes). Add onion, tomato, chopped peanuts and chili and stir until heated through. Stir in bread, salt and pepper. Reduce heat to low and cook until bread is golden, stirring frequently. Add lemon juice, remove from heat. Sprinkle with coconut and cilantro. Serve immediately.