01 - In a medium saucepan, combine the diced mango, chopped serrano chilies, minced garlic, chopped onion, water, and apple cider vinegar over medium heat.
02 - Bring the mixture to a gentle simmer and cook for 10 minutes, stirring periodically, until the mango pieces are soft and the chilies are tender.
03 - Remove the saucepan from the heat and allow the contents to cool slightly.
04 - Transfer the cooled mixture to a blender. Add the lime juice, agave syrup, salt, and cumin. Blend until the mixture is entirely smooth.
05 - Taste the hot sauce and adjust seasonings, sweetness, or heat level according to your preference.
06 - If a thinner sauce consistency is desired, blend in small increments of additional water until the desired viscosity is reached.
07 - Pour the prepared hot sauce into sterilized bottles or jars. Allow to cool completely before sealing and refrigerating. Consume within 3 weeks.