In a bowl, add the chopped spinach, artichoke hearts, Kalamata olives, pimentos, feta cheese, oregano, cream cheese, sour cream, Mozzarella cheese, garlic, black pepper, and salt. Stir briefly to combine.
2 10-ounce bags fresh baby spinach, roughly chopped, 2 13-ounce cans quartered artichoke hearts, drained and chopped, 1/2 cup Kalamata olives, 1 4 ounce jar pimentos, drained, 8 ounces feta cheese crumbles, 2 teaspoons dried oregano, 2 8-ounce bricks cream cheese, 2 cups sour cream or Greek yogurt, 2 cups Mozzarella cheese, 6 cloves garlic, 1 teaspoon black pepper, 1/2 teaspoon fine sea salt