Gina's Vegetable Dip

Mix the day before:
1 cup sour cream
2 cups mayonaise
1 Tablespoon parsley
1 teaspoon sugar
1/2 teaspoon garlic
2 Tablespoons parmesan cheese
1 Cup shredded mozarella
1 Tablespoon minced onion
1 teaspoon salt
1 teaspoon pepper