Wash strawberries and pat dry. Remove tops and chop, then add to a saucepan. Add the sugar and lemon juice and stir.
Set over medium heat and bring to a simmer, stirring to dissolve sugar. Cook 10 minutes, stirring occasionally.
Mash the berries roughly with a potato masher or the back of a spoon. Continue to cook for 10-20 minutes, until the compote has thickened slightly. (It will continue to thicken as it cools, but should remain pourable.)
Transfer to an airtight container and let cool slightly before serving, or cool to room temperature and chill.