If you're not already doing this.....let her snack. Some moms will tell you not to encourage snacking as they will never sit down to a meal again. Not true. This is a phase. Seems like they're always going through some kind of phase, doesn't it?!
She's just a typical toddler and is on a mission to explore her world. Getting her to slow down for eating will be hard to do. I'm thinking this is the age we introduced the "snack tray". An ice cube tray and only filled it with healthy items. Some dry cereal, cheese cubes, and other items that can stay out all day. Put it within in her reach. She can partake when she wants. Her blood sugar levels stay constant. She's never starving. And she only has acces to healthy foods. There was quite a chunk of time when DS would not even eat a real meal with us. But now he's getting back to where he will. This is just what toddlers do. You can't make her eat. But you can choose what she eats. So just keep offering healthy foods.
This is also the age when they are really into self feeding too. So another benefit to the snack tray is that she can self feed and use those hands. And also, what seems like a snack to us can be a meal to her. So she may be getting more than you think.
I love me some Dr. Sears (and his whole dang family!). Here are some links with excellent tips.
FEEDING TODDLERS: 17 TIPS FOR PLEASING THE PICKY EATER
http://askdrsears.com/html/3/T030800.asp
FEEDING AT A GLANCE: Birth - 24 months
http://askdrsears.com/html/3/T030500.asp
Shaping Young Tastes
http://askdrsears.com/html/3/T031900.asp
Good luck!