Preheat the oven to 350. Cut loaf of bread lengthwise and place both halves on a baking sheet and set aside.

In a bowl, mix together cheese, mayo, and garlic powder. Divide the mixture in half and spread 1/2 onto one halve of the bread and then repeat with the remaining mixture.

Bake bread for 20-25 minutes or until cheese is golden brown. Slice into individual pieces and serve. Store leftovers in the fridge and reheat in the microwave.