I've got a couple of soup recipes where most of the veggies are either mashed or blenderized, so the veggies are well hidden. They work pretty well with my DS.
1) Carrot and Dill Soup
Chop & Saute: 4 carrots, 3 celery sticks, 2 med. onions and 2 med potatoes.
Add: 2L chicken stock
Cook for about 20 mins. Puree in blender.
Add: 1/4C dry dill, 2 bay leaves, juice from one orange, salt and pepper to taste.
Cook for about 30mins longer and enjoy!
2) Veggie Soup
Chop and put in large pot: 1-3 potatoes, 1 head cauliflower/broccoli/any other veggies, 1 med onion
Cover with water and simmer til soft.
Add 2 C peas
Blend 1/2 - 1 C cashews in water just to cover til fine.
Add parsley, garlic salt, chicken seasoning.
Mix into veggie mixture and heat.
Another trick that works well with Liam: mixing pureed or mashed veggies with brown beans. He LOVES brown beans, so he'll scarf down anything if it's mixed in!