Wednesday - I've always remembered how to spell this by saying WED NES DAY or "WEDDING'S DAY", but it's primarily pronounced wenz day or wenz dee. I searched several references, and found only a small set of people who include the "wed" sound, saying "wednz day":
Pizza Most Americans pronounce it like "Pete's a good guy" or technically:
Some people might say pee zza because that's how it looks or their parents and friends said it or they think it sounds Italian (it doesn't).
When it comes to radio shows, announcers are trained to enunciate, over-pronounce, or stress words in special ways that emphasize clarity over absolute correctness; it might not even be precisely the correct pronunciation. So if you listen to radio announcers, you can sometimes hear non-typical pronunciations.
Information on pronunciation of minestrone has been moved here: How do you pronounce, "minestrone"?