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Blue “moonmelon.” | 15 Viral Pinterest Photos That Are Actually Fake..According to the caption: “This fruit grows in some parts of Japan, and is known for its vibrant blue color. What you probably don’t know about this fruit is that it can switch flavors after you eat it. Everything sour will taste sweet, everything salty will taste bitter, and it gives water a strong orange-like taste.”
This website has a full menu of Harry Potter-themed snacks, and links to other websites with even more recipes.