Cut the onion and tomato into small pieces.
Dry roast cinnamon, cardamom, clove and fennel on a low flame until you get a good aroma. Keep them aside, grind to a powder when cool.
Take oil in a pan, add mustard seed, once it splutter throw in cumin, turmeric powder and the curry leaves. Put the chilli pieces, saute and add the onion.
Once it is golden in colour, put the ground spice powder. Add chilli powder, mix and now put the tomatoes. Put salt and allow to cook. Let it be mushy.
Spicy tomato chutney is ready. One can grind it if needed.