Prepare the strawberries. Place the berries in a saucepan, pour in 100 ml of water, add sugar and put on the fire, boil for 1 minute. Strain the syrup through a sieve.
Prepare the jelly base. Pour the remaining water over the agar-agar and let it sit for about 5 minutes.
Prepare the jelly. Add the agar-agar solution to the strawberry syrup and boil for 1-2 minutes. Pour the jelly into molds and let cool at room temperature. Then put it in the refrigerator for 3 hours.