1. Preheat your oven to 350°F (175°C). Line an 8×8-inch baking dish with parchment paper, leaving some overhang for easy removal later.
2. In a bowl, combine the flour and granulated sugar. Stir in the melted butter until the mixture resembles wet sand.
3. Press the dough evenly into the bottom of the prepared baking dish. Bake for 15 minutes or until lightly golden. Let it cool completely.
4. While the crust is cooling, beat the heavy cream with powdered sugar and vanilla extract until soft peaks form. Spread this creamy mixture over the cooled crust.
5. In a small saucepan, combine the sliced strawberries, lemon juice, and cornstarch. Cook over medium heat until the mixture thickens and the strawberries are soft, about 5-7 minutes. Allow to cool slightly.
6. Spread the strawberry mixture over the cream layer. Chill the bars in the refrigerator for at least 2 hours, or until set.
7. Once chilled, lift the bars out using the parchment overhang and cut into squares. Enjoy the fruits of your labor!

Remember, cooking is about feeling your way through it. Don’t worry if it gets a little messy—it’s all part of the fun!