Rinse and drain ikan bilis. Use paper towels to pat dry.
Roast peanuts in a 350°F (180°C) oven for 12 to 15 minutes until lightly brown. Remove and set aside.
Heat a tablespoon of vegetable oil in a non-stick fry pan over medium heat. Place tempeh in a single layer and fry each side for about 4 minutes. Remove and set aside.
Add another tablespoon of vegetable oil. Fry ikan bilis for about 5 to 6 minutes until golden brown. Remove and set aside.
In the same pan, add the remaining tablespoon of vegetable oil. Cook chili paste for about a minute. Stir in brown sugar, vinegar, water, and salt. Add fried ikan bilis, roasted peanuts, and fried tempeh. Stir to get everything well mixed.
Remove and serve warm or at room temperature.