Let's be honest here, I was able to get two breakfast's with sausages, 2 pancakes, a cupcake and 2 coffees for less than $7. I can't make all of that on my own for $7. It's always busy here on the weekend so go early before the huge line ups.
I recommend looking for the actual entrance for the IKEA Restaurant as it looks like no one really knows about it so the line for that side is super short compared to the "exit" that everyone enters from because that is the only way to get in at first glance once you get up the stairs.