Purple sweet potato muffin

I continued to make my purple potato series of "Spring Tour Cuisine". I searched the Internet for a recipe for "Banana Muffin". I made seven changes to make a "purple potato Muffin" with the existing ingredients at home. Unexpectedly, it was very successful. It tasted soft and non-greasy. My daughter liked it very much, but how did the color look like this? I worked on this Muffin for a long time last night, just to consume up all the cooked purple potatoes at home. If such an expensive potato goes bad, I will really be ripped off by Lei Gong! Purple potatoes, haha, are actually sweet potatoes, but the color is quite special. They are the aristocrats among sweet potatoes!