Mano i know you asked Lusi, but i recently made spring rolls stuffed with boiled and mashed aloo with just salt and red chilli. They were so yummy. The idea came to me after we had them in Pakistan and i was in spicy heaven. Just make sure you use good quality potatoes. Also, to emphasize i used spring roll sheets not egg roll ones, not sure how those would turn out.
Ira, do you have to soak or steam spring roll sheets first or what. I have seen them at oriental grocery stores, they keep them outside and they are hard like pasta... so i never tried them as I wasn't quite sure how to use them...
Mano, my filling was very simple, I stir frired some very finely sliced carrots and corn. Season them with soy sauce, salt and pepper. Then add it to finely chopped cabbage and finely sliced celery. Add salt and pepper to taste and little chat masala for flavoring. Thats it...