Preheat your oven to 375°F (190°C). This is crucial as you want your pie to bake evenly and achieve that irresistible golden crust.
In a large bowl, whisk together 4 tablespoons of raw sugar, 1 1/2 tablespoons of cornstarch, and a pinch of salt. This mixture will help sweeten and thicken the berry filling as it bakes.
Now it's time to add the stars of the show! Toss in 1 1/4 cups of sliced strawberries, 1 1/4 cups of raspberries, and 1 1/4 cups of blackberries. Gently mix to coat the berries in the sugar mixture.
For a burst of brightness, add 1 teaspoon of fresh lemon juice and 1/4 teaspoon of lemon zest to the berry mixture. This will enhance the flavors beautifully. Set the mixture aside to marinate for a few minutes.
While the berries are soaking up the flavors, take your refrigerated pie crust and cut it into four circles about 4 inches in diameter. Roll each circle slightly to elongate them for easier placement on top of the berries.
Next, cut a heart or any shape you like out of the center of each crust to allow steam to escape while baking. This will prevent your pie from becoming soggy.
Place the berry mixture evenly into four oven-safe ramekins or a pie dish. Then, gently place the dough rounds over the fruit, brushing the top with a beaten egg to give it a lovely sheen when baked.
Arrange your ramekins on a rimmed baking sheet to catch any drips. This will save you from a messy oven!
Carefully place the baking sheet in the center of the preheated oven and bake for about 40 minutes. You'll know it's ready when the berries are hot and bubbling, and the crust is golden brown.
Once baked, allow your Mixed Berry Pie to cool for a few minutes before serving. It’s best enjoyed warm with a scoop of ice cream or chilled with whipped cream!
