Creamy Spinach Artichoke Cheese Dip for Appetizers - cookrisp

Ingredients

• 1 small white or yellow onion, chopped
• 2 cloves garlic, minced
• 10 ounces fresh spinach
• 2 cans artichoke hearts, drained and chopped
• 4 tablespoons unsalted butter
• 8 ounces cream cheese, softened
• 16 ounces sour cream
• 2/3 cup mayonnaise
• 6 ounces shredded Parmesan cheese
• 8 ounces shredded mozzarella cheese
• 1/2 teaspoon ground pepper
• 1/2 cup vegetable or chicken broth