Spinach Dip Ala Wendy

Ingredients

• 1 (10 ounce) package frozen chopped spinach (thawed and WELL drained)
• 1 cup water chestnut (finely chopped)
• 1 cup sour cream
• 1 cup mayonnaise
• 1 (1 1/4 ounce) envelope vegetable soup mix
• 1 small onion (finely chopped)
• 3 teaspoons parmesan cheese
• 1 teaspoon season salt
• 1 large round sourdough loaf (hollowed out for the dip with the remaining bread being diced into cubes for dipping)