Toss the strawberries, sugar, and lemon juice into a small saucepan. Turn the heat to medium.
Stir occasionally as the mixture begins to bubble and the strawberries soften—this takes about 8–10 minutes.
Want it thicker? Stir in your cornstarch slurry and cook for another minute or two.
Let it cool a bit before you start spooning it over literally everything in sight.