I thought it was "Smashed Tomatoes" instead of mashed patatoes
A childhood belief about general

others believed things like this
- When I was little, I thought that big puffy clouds in the sky were actually mashed potatoes.Anon
- I thought rice was just another way to prepare a potato, like mashed or fries.— Me
- when i was little i thought pigs ate only tomatoes because bacon and ham was red when cooked.Anon
- I used to think clouds were mashed potatoes in the sky.— Will
- I used to believe that french fries were filled with mashed potatoes.... wonder how they got in there?— Nancy
- i used to think honey came from smashed up bees— Sabrina