1 onion, chopped
1/4 cup butter, melted
3 sweet potatoes, peeled and diced
3 zucchini, chopped
1 1/2 cups fresh broccoli, chopped
3 (14 ounce) cans chicken broth
2 potatoes, peeled and shredded
1/2 teaspoon celery seed
2 teaspoons salt
1 teaspoon ground cumin
2 cups milk