Sort:  

That must be the young dandelion leaves, there are lots of them here right now, very similar leaf structure to your rocket.
The dandelion leaves are kind of bitter, I throw them and most of these greens into a kefir smoothie with honey and a banana, and usually a carrot. Spinach I usually eat straight from the garden, it rarely makes it back to the house!

Rocket almost has a peppery taste and is great in a leafy salad...

Yes same here (but I make sure to plant extra for the table LOL) especially baby spinach!