With the rack in the bottom position, preheat the oven to 150°C (275°F). Line a baking sheet with parchment paper.
In a large bowl, combine all the ingredients. Set aside.
In a small saucepan, melt the butter. Add the remaining ingredients. Pour over the mix in a thin stream. Toss to coat. Spread in an even layer on the baking sheet. Bake for about 1 hour, stirring frequently. Let cool.