[header] How to make raspberry puree [title] Combine the ingredients in a saucepan. [step] Place the raspberries, sugar and lemon juice in a large saucepan. You may use fresh raspberries if they're in season, or frozen raspberries, which are available year round and are picked and frozen at the peak of freshness. 
Stick with the minimum amount of sugar and lemon juice that the recipe recommends for now. More can be added to taste later if the puree turns out too tart or sweet.