I think raw veggie are great, but only if your babe can handle it - and lots of doggies can't. So, then - you can either steam them and give. Or, steam and puree (even less digestive stress w/ pureeing bc the body doesn't have to work to break them down).
The advantage to feeding raw veg is that you don't cook the vits/mins out of them - but a lot of dogs just don't do too well. Since Layla is having some issues, I'd probably err on the side of cooking (i.e. "starting" the digestive process for her) the beans.