I am making the Chickpea Dahl from the go veggie for may challenge but don't have any tinned lentils

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Can I used dried red lentils instead?

If I can, what weight? The recipe just says I tin.

Do I need to cook them first?

Thanks

Pulses increase in weight by about 3x when cooked. So an ounce of dry red lentils turns into about 2.5 or 3ozs cooked. If the recipe asks for a 200g tin that would equate to about 80g dry weight and add a little extra fluid to the dish at the same time

Thank you.