not sure I would substitute baby food for veggies for a dog on a diet. take aloof at the calories before you consider it (there might be some baby veggies low on fat? no fat?). The veggies were just to help the dog "feel full". if she is being picky about them I would say her loss (and I would not give her any baby food or further veggies)
Try green beans. frozen or fresh (canned has salt added wich is not good)
I have given my girl, Breezy, baby food ( green beans, carrots, sweet potato ) but just make sure there is NO garlic or onion powder in it. I buy the Organic baby food; it's just veggies, no salt or onion/garlic powder. What I do with the baby food is put it in her Kong and freeze it. It makes a great low-cal treat in the summer and takes her a while to eat it all because it's frozen. She loves it!!