Splitting a Rosemary Plant?

Splitting a Rosemary Plant?

Hi all, I have the most amazing rosemary plant growing in a pot in my kitchen; I've had it for three years now; I replant it about once a year so the roots aren't crowded and it stays indoors in the winter. It's a beast and it's out of control. In a month's time it's gone from the first picture to the second picture in size (I'll put them under a cut) My question is how in the world do I split this plant? I've included a picture of the base of the plant as well. I do not want to wreck this plant by splitting it but my God, it's out of control and my husband has politely requested (he's a sweetie he he) that I either split it or start cooking with it more (which, honestly, isn't going to happen. We're at our threshold for rosemary flavored dishes) Thanks so much for your help!! A month ago rosey Today Photobucket Middle of plant Photobucket eta: thanks everyone, looks like old Rosey's going to get a trim :)
UFO

UFO

today’s garden pickings

today’s garden pickings

flower bed direction

flower bed direction

Try marigolds with your veggies.

Try marigolds with your veggies.

Hi!

Hi!

hello and new

hello and new