蒸しルビー

I think there's home restrictions on types of img properties that work - you're typically not allowed to use data-urls, which is when you have the image data encoded into the url, because there are security concerns. Regular urls like you'd use in your browser should work as the "src" property, though

<img src="https://upload.wikimedia.org/wikipedia/en/thumb/9/9d/Slime_%28Dragon_Quest%29.png/220px-Slime_%28Dragon_Quest%29.png"></img>

(note that technically you don't need the </img> tag if you do <img /> because that tag specifically is special)

Generally, I find the markdown version easier than html for image tags:

![alt-text description of image](https://upload.wikimedia.org/wikipedia/en/thumb/9/9d/Slime_%28Dragon_Quest%29.png/220px-Slime_%28Dragon_Quest%29.png)