4 Cheese Warm Spinach Dip

Ingredients

• 1 (10 ounce) package chopped spinach, drained
• 1 cup mayonnaise
• 1 onion, chopped
• 1 cup sour cream
• 2 garlic cloves, minced
• 1 teaspoon brown mustard
• 1/2 teaspoon pepper
• 1/4 teaspoon salt
• 3 dashes hot sauce
• 1 cup mozzarella cheese, shredded
• 1 cup cheddar cheese, shredded
• 1/2 cup parmesan cheese, grated
• 1 (250 g) package cream cheese, softened
• 1 round sourdough bread