Prep the berries: Wash, drain, and hull the strawberries with the point of a small knife or a strawberry hulling tool. Or you can cut the top off but you will lose a bit more of the berry that way.
Combine with sugar: Put the strawberries in a bowl with the granulated sugar and a squeeze of lemon juice if you like; gently stir and let them sit at room temperature for at least 30 minutes. Or cover and refrigerate them if you plan to let them macerate for more than an hour or two.