1. Lentils: This should work with any type of lentils except Puy Lentils (French lentils, small dark brown/black ones because they hold their shape). Red, yellow, brown, green. The colour of the soup will just be a bit different.
Cook times vary slightly as well so just start checking if the lentils are done at around 30 minutes.
I really urge you to make this with dried lentils if you can. Better texture and flavour compared to canned. However, to make this with canned lentils, use 2 x 400g/14oz cans of lentils (drain and rinse lentils) and reduce the broth by 1 cup. Simmer liquid for 20 minutes before adding the lentils then cook with lentils for another 15 minutes (don’t want to cook canned lentils for too longer otherwise they will turn into mush).
2. Storage: This freezes extremely well! Or keeps in the fridge for 3 to 5 days.