1. In a small cooking pot, add strawberry and sugar, cook until strawberries are soft.
2. Transfer into a safe-heat bowl and blend until smooth. Then set aside.
3. In an another bowl, add the butter (softened), and mix with an electric hand mixer until smooth. Then add the strawberry puree little by little (or else butter and puree would separate). Mix well at each addition, continue until you use it all up.
4. Add a dash of salt if you used unsalted butter. Mix. Transfer into a small cup, cover and chill in the fridge.
Enjoy with a slice of bread or anything else you like!