Preheat oven to 300 degrees. Spray a 9x13 pan with cooking spray. Pour popped popcorn into pan. Top with oats, cranberries, and peanuts.
Combine brown sugar, honey (or corn syrup), and cinnamon in a medium saucepan. Cook on medium-high heat for 6 minutes, stirring occasionally, or until mixture comes to a full boil and the brown sugar is dissolved. Pour syrup over popcorn mixture. Stir until the popcorn mixture is evenly coated.
Bake for 10 minutes. Remove mixture from oven and stir to redistribute the syrup. Bake for an additional 10 minutes. Remove from oven. Lightly press the mixture into the pan. Cool for 2 hours. Cut into bars.
Place bars in snack sized bags and then place in a freezer bag or container. Seal, label, and freeze.
Thaw and enjoy!
Per Serving: 145 Calories; 4g Fat (21.0% calories from fat); 3g Protein; 27g Carbohydrate; 2g Dietary Fiber; 0mg Cholesterol; 70mg Sodium.
Exchanges: 1/2 Grain (Starch); 1/2 Fat; 1-1/2 Other Carbohydrates.