Heat oven to 300°F. In large bowl, mix popcorn, crackers, pretzel sticks and bagel chips; set aside.
In small bowl, stir remaining ingredients until well blended. Pour evenly over popcorn mixture; toss to coat. Spread evenly in ungreased 15x10x1-inch pan.
Bake 8 to 12 minutes, stirring occasionally, until thoroughly heated. Cool 30 minutes. Store in tightly covered container.