Skin out the mangoes. Slice the mangoes into 1/2 inch pieces length and 1/4 thin pieces. (Note: Do not use the seed in the pickle)
Add 2 tsp salt and keep a heavyweight on it for a day.
Next day, squeeze & remove the water from the mango and keep it aside.
Keep a wok and pour 4 cups of water. Add the sugar and make a syrup, add chilli powder, clove, cinnamon.
Add the squeezed mango slices, lower the flame and cook well till the sugar syrup turns light brown (Make sure to not burn the sugar syrup). Add 1 tsp vinegar and salt to taste.
Remove from gas and let it cool.
Fill in a bottle.
You can eat it with chapatis, rotis, bread and even with food as pickle.