Step 1: Prepare the Ingredients

1. Preheat your oven to 375°F (190°C).
2. Chop the black and green olives into small pieces and set aside.
3. Grate the mozzarella and cheddar cheeses and mix them together in a bowl.

Step 2: Make the Olive Cheese Mixture

1. In a large mixing bowl, combine the chopped olives, shredded cheeses, mayonnaise, butter, garlic powder, oregano, and black pepper. Mix thoroughly until the ingredients are evenly combined.
2. Taste the mixture and adjust the seasoning as needed, adding more pepper or oregano to suit your preferences.

Step 3: Prepare the Bread

1. Slice the French bread lengthwise or into individual rounds, depending on your preferred presentation.
2. If desired, lightly brush the bread with olive oil to enhance its crispiness.

Step 4: Assemble the Olive Cheese Bread

1. Spread the olive cheese mixture generously over each slice of bread, ensuring the topping is evenly distributed.
2. Arrange the prepared bread on a baking sheet lined with parchment paper.

Step 5: Bake the Bread

1. Place the baking sheet in the preheated oven and bake for 12-15 minutes, or until the cheese is melted and bubbly.
2. For a golden, crispy top, switch to the broil setting during the last 2-3 minutes of baking. Keep a close eye to prevent burning.

Step 6: Garnish and Serve

1. Remove the bread from the oven and let it cool for 2-3 minutes.
2. Garnish with fresh parsley or red chili flakes for an extra burst of flavor and color.
3. Serve warm and enjoy!