Preheat the oven to 375°F. Grease a 9 × 5-inch loaf pan.
In a large mixing bowl, sift together the flour, baking powder, and salt. Mix in the pecorino cheese and oregano.
In a medium bowl, whisk the eggs until foamy. Whisk in the milk, oil, and wine until combined.
Fold the egg mixture into the flour mixture, and use a spatula to mix until the flour is completely absorbed. Add the diced cheese, meats, and olives, mixing them into the batter evenly with a fork. Transfer the batter into the prepared loaf pan.
Bake the bread for 40 to 45 minutes until a toothpick comes out clean in the center. Let the bread cool in the pan for 15 minutes, then unmold the bread and let cool completely on a rack before slicing.