Preheat your oven to 350°F (175°C). Grease and line an 8x8-inch baking pan with parchment paper.

In a large bowl, whisk together the melted butter and sugar until smooth.

Add the egg, lemon juice, lemon zest, and vanilla extract, and whisk to combine.

Stir in the flour and salt until just incorporated, then gently fold in the diced strawberries.

Spread the batter evenly into the prepared pan.

Bake for 25–28 minutes, or until the edges are lightly golden and a toothpick inserted into the center comes out mostly clean.

Let the blondies cool in the pan.

While cooling, make the glaze by whisking together powdered sugar, lemon juice, and lemon zest until smooth.

Drizzle glaze over the cooled blondies. Let set before slicing into squares.