In a small pot, combine the honey, brown sugar, and oil.
Bring the mixture to a boil over medium heat, stirring occasionally.
Place the granola in a large, heatproof bowl. Carefully pour the hot sugar mixture over the granola.
Stir immediately with a spatula until the granola is completely and evenly coated.
Press the mixture firmly and evenly into an 8 or 9-inch square pan. For best results, use the bottom of a glass or measuring cup to compact it tightly.
Let the pan cool completely in the refrigerator until firm, at least 30 minutes.
Cut into squares or rectangles and serve. Store in an airtight container for up to 4 days.