In small saucepan, heat 3/4 cup water and sugar over medium-high heat. Cook until all sugar is dissolved, stirring occasionally (do not boil). Remove from heat; let stand 10 minutes, then transfer syrup to jar or bottle and refrigerate until completely cool.
In blender, puree strawberries and remaining 3-1/4 cups water until smooth. Strain mixture through fine mesh strainer; discard solids.
Fill large pitcher with ice. Add lemon juice, strawberry liquid and 1/2 cup simple syrup. Stir until well combined, then taste and adjust flavor with additional simple syrup or water to adjust the sweetness to your taste.
Serve over ice, garnished with lemon and strawberry slices, if desired. Refrigerate any leftovers in a covered container for up to 3 days.
Notes
Simple syrup can be stored in an airtight glass container in the fridge for up to 3 weeks.
The riper the strawberries, the sweeter and more flavorful your lemonade will be. If your berries are incredibly sweet, you may need less simple syrup than called for.
Mango nectar for the strawberry mango lemonade variation can be found in the shelf stable juice or Mexican/Latin American aisle of any well stocked supermarket. We used the Jumex brand for testing this recipe.
This website provides estimated nutrition information as a courtesy only. You should calculate the nutritional information with the actual ingredients used in your recipe using your preferred nutrition calculator.