Diet and Nutrition after urostomy, Re-introducing regular foods

Our research and what we've been told said to follow a low fiber diet for a month to several weeks after surgery. Rather than depend on the internet for information (although I have researched the NIH, NIDDK, Mayo's site and other reputable health organizations, we are looking for guidance from registered dietitian/nutritionist about adding high fiber foods back to the diet. Also, we need to know which foods are to be avoided for life (such as popcorn, corn, nuts, seeds and so on.) Being mostly vegetarian, makes it particularly challenging, as a daily diet has over 35 gm of fiber!