Mix the berries in a medium saucepan. Add in the sugar.

Stir while the berries get hot. Add a few tablespoons of water, if needed, to keep the fruit from sticking to the pan.

In a small cup, mix the cornstarch with equal parts of cool or cold water. Mix until well blended.

When the berries start to boil, add the cornstarch mixture. Stir well. In a few minutes, the berries will start to thicken. Serve immediately.

CHEF'S NOTE: You can also use 3 cups of frozen mixed berries that you buy in the frozen section of your local grocery store.