Place chicken breasts in baking dish. (I advise using nonstick foil. Once this is cooked, there is a lot of mess leftover. It just makes cleanup easier.) Drizzle lightly with olive oil and sprinkle both sides with salt and pepper.
In a saucepan, heat 2 TBSP olive oil over medium heat. Add minced garlic to heated oil. Cook until softened, about 2 minutes. Turn off the heat and add the brown sugar. Stirring until combined. Spread the brown sugar mixture evenly over each piece of the side that is facing up.
When oven is heated, bake chicken for 15-20 minutes. Remove and serve.
If feeding more than two people, I would use 1 TBSP Olive Oil and 1 TBSP Brown Sugar per breast, and garlic to taste.