For veggies and fruits I would recommend apples, bananas, and spinach. Your dog will enjoy this hopefully, aside from just being nutritious and healthy. There are more of these examples here. I also saw that my dogs really enjoy having chicken, peanut butter, yogurt, and eggs. You could try these foods if you are looking for such.
Occasionally give your dog some dry kibble too aside from the wet food. I realised the best way to feed my pets with consistency is by using an automatic pet feeder for them because that way i just set food times, portions and boom! Provided food is in the dispenser they will get fed even when am not around. It works well for both wet and dry food.