Preheat oven to 350 degrees F. Toss the rice cereal, green beans, chow mein noodles, almonds and sesame sticks together in a large bowl. Whisk the butter, teriyaki, brown sugar, vinegar, garlic, five-spice, pepper flakes and 1/2 teaspoon salt together in a small bowl until smooth. Pour the sauce over the snack mix and toss well.
Spread in one layer on a rimmed baking sheet and bake until the mix is toasted and almost completely dry, 16 to 18 minutes, stirring occasionally. Remove from the oven and stir in the wasabi peas. Let cool completely, and then store in an airtight container for up to 3 days.
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