1 1/2 tablespoons seeded dried red chilies, chopped coarsely
1/3 teaspoon baking soda
Preheat oven to 250 degrees Fahrenheit. Line a baking sheet with parchment paper, and spray with non-stick spray/brush with oil. Set aside.
In a pot, heat oil and add popcorn kernels. Cover, and cook for five minutes shaking occasionally until fully popped. Transfer to a large bowl, and add peanuts.
In a large saucepan add brown sugar, vegetable oil, corn syrup, lime juice and fish sauce. Cook on medium high heat for five to six minutes until thickened. Remove from heat, and stir in Sambal Oelek, Kaffir lime leaf, dried red chillis, and baking soda. Pour mixture over popcorn and peanuts, and stir to coat evenly.
Transfer popcorn to lined baking sheet in one even layer, and bake for 30 minutes, stirring the mixture every 10 minutes.
Remove from oven, and allow to completely cool before serving.