they might be a little soft or runny during the period of time where your dog is getting used to more variety in the diet. that's nothing to be alarmed about tho.
keep a can of pumpkin (pure, not the spiced pie filling mix) on hand and add a teaspon or two as needed.
one thing you need to keep in mind is that the digestive tract of a dog can not break down plant cell walls - so if you want to feed fruits or veggies, feeding them in big chunks will pretty much make them come out the same way they went in.
so any stuff of that sort will have to be either mechanically (blender, food processor) or chemically (cooking/steaming, being overripe) broken down so the dog can digest it.
you'd need to mash that apple into applesauce or steam the broccoli so it becomes digestible.
what i do is steam several pounds of 3-5 different veggies, then put them in the blender to make an applesauce-like consistency. to this i add some kelp powder, then package it with the meat part of the diet in portion-sized rations and into the freezer it goes. if you don't have much space, use snack-sized zip lock baggies - you can lay them out flat on a tray and 30 or 40 of them don't take up much space at all.
thaw on the counter or in the refrigerator over night and feed in the morning.