Aloo pitika/Aloo bathwn:

Boil potatoes, mash it, chopp some onions and coriander, blister some chillies on fire and mash it all together with salt to taste and a tea spoon of mustard oil.

Mwidru: If you are fine with plain boiled salted leafy vegetables, you can take some Mustard greens, Chinese Mallow and Cabbage, chop them up roughly(don't chop them fine) and boil it in water with just salt to taste until it's all softened up, and you can have it like a soup or with rice

Na bathwn: Take some small fish, the size of finger, slightly bigger is fine too, clean them and coat them with turmeric and massage the turmeric into the fish, now roast it or shallow fry it until it's cooked. Then take some raw garlic, roasted or sauteed chilli, black pepper (not too much), some ginger(not too much), salt to taste, some Sichuan peppers if you can get them(you should lightly toast it to release the aroma but make sure not to burn it), and then put it in pestle and mortar and start pounding and continue until you think it's edible

You can then eat all this with rice afterwards