1 cup fresh spinach, chopped
1 cup cream cheese, softened
½ cup sour cream
½ cup mayonnaise
1 cup shredded mozzarella cheese
¼ cup grated Parmesan cheese
2 cloves garlic, minced
1 small onion, finely chopped
1 teaspoon lemon juice
½ teaspoon red pepper flakes (optional)
Salt and pepper to taste
Tortilla chips or fresh veggies for serving