In one pan, melt more than 1 tsp butter, add onion,carrot,half of capsicum. stir fry it for 5 min.
Now add corn kernel & simmer it for 10 min.remove from fire, let it cool, then finely blend it from blender.
Take another small pan,melt remaining butter,add remaining capsicum & corn , stir fry it for 5 min.
Heat a large pan,pour all blended mixture in it,add 3-4 cup water(depend upon the desire thickness of soup) & let it simmer for 10 min,before remove it from fire add fried capsicum & corn, cook it futher only a minute & serve it.