Katta sambol is made with dried fresh chillies, and Maldive fish flakes. After adding onion and lemon juice with salt make it a beautiful spicy reddish salad to accompany milk rice or Kiribath.

There is another salad called Lunumiris. Thats also similar but no Maldive fish flakes. Its the vegetarian version.

 

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This is to make Katta sambol for 4-6 people. 1-2 table spoon full Maldive fish Flakes, enough salt to your taste, Juice of a lime (about 1-2 table spoon ) 1-2 Tablespoon full chillie flakes. (Always you can adjust the chillies to your taste), Salad onion or red onions. The more the nicer.
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Add chillie flakes or whole red dried chillies to a mortar or in to a grinder.
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After add the salt.
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Next add the Maldive fish flakes.
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Add onions too. If you are using the larger salad onions make sure to slice them before adding in to the mortar.
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Use the pestle to crush. 
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Squeeze the lemon or lime juice.
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Take out and mix well.
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Serve with milk rice.