In a small bowl, whisk the cornstarch and water with a fork until completely dissolved.
In a small saucepan, combine the cornstarch mixture, strawberries, lemon zest, lemon juice, and sugar.
Heat over medium-low until the mixture starts to simmer, stirring occasionally.
As it cooks, stir frequently and break up any larger strawberries with a spoon.
Simmer for about 5 minutes, stirring constantly, until the sauce begins to thicken.
Remove from heat and let cool for 5 minutes. The sauce will continue to thicken as it cools.
Serve warm over pancakes, waffles, or Swedish pancakes.
Notes
Note 1: Double check the ingredients if making this for someone on a gluten free diet. Or swap it with arrowroot powder.Note 2: If strawberries are in season, go ahead and use fresh, but if not, frozen strawberries work too! Note 3: Sugar can be swapped for pure maple syrup, not the imitation kind. This is great for a refined sugar free option.Storage: Store leftover strawberry sauce in an airtight container in the refrigerator for up to 4 days. Reheat in the microwave for 15–30 seconds, or warm gently on the stovetop.