Wash, remove seeds and cut 1 large sized red bell pepper into chunks.
Peel and wash 10 cloves of garlic.
Next, put 2 Thai chili peppers, 10 peeled garlic cloves, 1 large cut up red bell pepper into the mixing bowl. Pour ½ cup of water and blend it.
Blend the mixture until it's little chunks, don't have to be fine and smooth.
After that, pour the mixture into a pot and turn on medium high fire until it's boiling. Then, add 1 cup of sugar, 1.5 teaspoon of salt, and ¾ cup of white vinegar. Stir and mix it well.
Turn the fire to small and simmer for 10-15 minutes. Then, add tapioca mixture (tapioca starch 1.5 tablespoons and water 2 tablespoons mix well) to thicken the sauce.
Cooking tips for how to make Thai sweet chili sauce:
Peel garlic and cut red bell pepper into chunks.
Then, put garlic, red bell pepper, water and Thai chilis into a tall container. I like to use a pitcher because the stuff won’t come out when you blend it. But, in the video I used a mixing bowl because it is easy to see.
Blend until it has little chunks that don't have to be very fine and smooth.
Add sugar, salt, white vinegar and simmer the sauce for 10-15 minutes.
I like to use tapioca starch to thicken the sauce because it gives a clear and transparent color. The sauce will be thicker when it cools down. However, you can use cornstarch. It works ok.
Since Thai chili is very hot, I only use 2-3 chili peppers. You can add more or less depending on how hot you want the sauce. I like to use two Thai chilis because it is not too hot and has a great spicy flavor.