Remove the greens from the strawberries and, depending on the size, cut into pieces, halve or even quarter. Then put in a saucepan and add a little lemon juice to taste, heat it up but do not boil it. Add some of the vanilla flavor and mix / stir.
Take a small high bowl and add 100 grams of the raw cane sugar. Add apple pectin and mix both together. Then the whole thing is added and briefly boiled, switch down & simmer for about 3 minutes. Then add the remaining raw cane sugar.
Now it is boiled again and it should cook for at least 5 minutes so that the apple pectin can completely dissolve. When the time is up, pour into one or more screw-capped jars. Close and turn upside down for a moment. Then turn it over again and let it cool down.