Fermented Hot Sauce Recipe. Fermenting chilli/peppers for hot sauce enhances flavour, acts as a natural preservative, introduces probiotics for gut health, and creates a unique and complex sauce with balanced heat. Ingredients - Water (filtered is ideal)- Salt (1 tbsp for each cup or 250ml/8.5oz), Red chilli, Red bell pepper or other sweet pepper, Onion, Garlic, Oil (I used olive oil, 1/3 cup), White vinegar (or apple cider, 1/3 cup)*the ingredients without measurements are really up to your dis