I have made a coulis with strawberries and raspberries, 500gms of each with half a cup of sugar and the juice of one lemon. I boiled it for 15 minutes, then pureed it, put it through a fine sieve to remove all seeds, then bottled it and sealed with a tamper-proof lid. My question is, how do I make this coulis shelf stable, are the ingredients I am using enough to ensure this will be fine until opened, then into the fridge?
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1You have not made this shelf stable at all, boiling for 15 minutes, then bottling it will allow foodborne pathogens in your coulis. You need to use a canning method, probably pressure canning as you likely don't have enough acid for water bath canning. This question has some details. – GdD Jan 18 '18 at 9:14
I recommend freezing portions of your finished coulis into some sandwich or freezer bags, and pulling them as you require.