Soak the chilies in hot water for about 15 minutes or until they soften. Remove the stems and the seeds. Keep the seeds if you don't feel like taking them out.
Put them in a food processor with the garlic, olive oil and cumin.
Blend until the mixture forms a coarse paste, scraping down the sides if necessary.
Taste and season with salt. Store in an airtight container in the fridge.