So I have this sauce that we make which consists of roughly 10 smallish tomatillo, 3 jalapenos, a couple Anaheim's, a couple pasilla, 5ish serranos, half an onion, water and a couple cloves of garlic. The ingredients are roasted, blended then heated for a short time to get the flavors to marry. The final ph at room temperature comes in at 3.9. Would seems like a good ph but I know the low ph is primarily just from the tomatillo and the USDA calls for it to be acidified further so what ph should I shoot for to make this "shelf stable"?. Just something I can use the "hot fill hold" method with and refrigerate after opening. I'm quite fond of the flavor and would like to use as little vinegar/whatever else as possible to make it safe. Thoughts? Here's a pic of the sauce.. cuz yea, I know everyone likes pictures..