Cut the fruit into small pieces, about ½-inch to 1-inch thick.
Place the fruit in a saucepan over medium-high heat, and add in the maple syrup and lemon juice, if using.
Bring the liquid to a boil, which will take about 4 to 5 minutes. Stir often so the fruit doesn't stick to the bottom of the pan.
Once the juices are boiling, lower the heat to a gentle simmer. Stir often, until the fruit starts to soften and break down.
This takes about 5 more minutes of cooking for berries, and it can take up to 10 more minutes of cooking for peaches or apples.
Use a spatula or spoon to press on the fruit and break it up as you stir.
When the fruit has softened, remove the pan from the heat and let it cool for at least 15 minutes before serving.
Serve warm over chocolate cake, cheesecake, pancakes, waffles, and more.
