Preheat oven to 400°F (200°C) and line a baking sheet.
Slice the bread horizontally and place cut side up.
In a bowl, mix butter, mayo, garlic, seasoning, cheeses, and olives.
Spread mixture evenly across the bread halves.
Bake for 20–25 minutes until bubbly.
Broil for 1–2 minutes until golden.
Cool slightly, slice, and serve warm.
