Corn Chowder with greens

1 can campbell low sodium chicken broth , w/ garlic and herbs 3 cans water 8 medium potatoes , peeled and sliced 1/4 inch thick 1/2 cup chopped onion 2 cups[...]

3 tablespoons butter 1/2 onion , coarsely chopped 1 (4 ounce) can diced green chilies 1/2 teaspoon minced garlic 6 cups frozen corn 4 roma tomatoes 6 cups[...]