If you're grappling an enemy and cast Misty Step, do you take the grappled enemy with you?

The range is ‘self’, so I recommend against including grappled enemies. 

It would say so, like Dimension Door

I'd say it works like a discount dimension door,considering it is obtainable at a lower level,and is only usable within range of what you can see. Dimension door could teleport you out of a house with a subject,while this seems like more of an escape/platforming tool for a lower level.

Does it provoke an AOO?

Quote from jedal5 >>

Does it provoke an AOO?

 

 Wondering this myself

Quote from Bradleydoc >>

Quote from jedal5 >>

Does it provoke an AOO?

 

 Wondering this myself

 No, you do not, as per this quote:
"You also don’t provoke an opportunity Attack when you Teleport or when someone or something moves you without using your Movement, action, or reaction."

This seems pretty underpowered to me.  The mist should offer some additional effect like, disadvantage on attacks against you or cause you to be lightly obscured.

Mr_Zrt

Underpowered? You get to take your steed with you if you have "Find Steed". Boom, instant war elephant in enemy ranks or on the other side of a pitfall. With no where to run, everything is doomed. 

How do you presume that you’re able to take your steed with you? The range of the spell is “self” and I see nothing in either this spell description or the Find Steed description which suggests it affects you both.

Your steed serves you as a mount, both in combat and out, and you have an instinctive bond with it that allows you to fight as a seamless unit. While mounted on your steed, you can make any spell you cast that targets only you also target your steed.

Shit. I’m drunk. Overlooked that. Touché!

No, or else following the same logic something grappling you would also come along with the misty step. The range is "self" and although I'm not in charge of the rules, I would think that would essentially make you and you alone teleport.

Quote from Codsonmaty >>

No, or else following the same logic something grappling you would also come along with the misty step. The range is "self" and although I'm not in charge of the rules, I would think that would essentially make you and you alone teleport.

 You are mistaken. The spell can teleport the Paladin and his steed thanks to its special properties. However, it will not teleport someone grappling you (unless the DM rules otherwise) because the spell only moves you (range is self).

So why does the steed move with you? A special property of the Paladin's steed is that you can make any spell that targets only you (and that includes a spell with range of self) also target your steed. Note: This only applies to a mount summoned by the Find Steed spell. Normal mounts which you buy or capture do not get this.