Wash peppers thoroughly.
Remove stems and rough chop the garlic. You can slice the peppers to remove seeds at this step if desired, which may reduce bitterness.
In a medium sauce pan, heat the olive oil over low heat.
Add the peppers and cover. Cook, stirring occasionally, until the peppers soften, about 8 minutes.
Add the garlic and continue cooking until fragrant, 1-2 minutes.
Add the vinegar, sugar and salt, stirring to combine.
Bring to a light simmer and cover, cooking for an additional 10 minutes on low heat.
Remove from heat and allow to cool for 10 minutes, covered.
Pour mixture into a blender and blend thoroughly until smooth.
Distribute the hot sauce into individual bottles using a glass baster or a funnel.
Store for 3+ months in the refrigerator.