Wash strawberries and lemons under "warm" water. Strawberries are one of the dirtiest fruits. You must wash lemons too as we need the zest from 2 lemons.
Place fresh strawberries and 1 cup cold water in a blender.
Process on high for several seconds.
In a medium saucepan boil lemon zest from 2 lemons, 3 cups of water and the strawberry purée. Heat on medium and simmer for 15 minutes. Make sure that the color of the purée turns into pink.
Sieve strawberry puree through a mesh strainer into a large bowl and add to fresh lemon juice.
Squeeze 2 cups of lemon (or more)
Sieve lemon juice
Add 2 cups of sugar to the strawberry purée after you have sieved it.
Mix the purée, sugar and the lemon juice for 2 minutes.
Mix the lemonade concentrate with water (I do half to half).