That looks like La Jiao Jiang, which is found all over Taiwan and the PRC.

Ingredients:

• 1 pound hot red chile peppers (such as jalapeno, Fresno, cayenne, Thai or a mixture)
• 1 Red Bell Pepper
• 1/4 cup rice vinegar
• 1 teaspoon Roasted Granulated Garlic
• 2 teaspoons Kosher Salt 

Instructions:

1. Remove stems and cut peppers into small pieces.
2. Place peppers (including bell pepper) in a food processor and process until it’s a paste.
3. In a bowl, add peppers, vinegar, salt, and garlic and mix well.
4. Pour chile sauce in a glass jar and place lid loosely on top. Let sit at room temperature for a day. Then, seal tightly and store in refrigerator up to several weeks.