Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a mixing bowl, toss halved strawberries with 2 tablespoons balsamic vinegar, 2 tablespoons honey, and vanilla extract.
Spread strawberries on the baking sheet and roast for 15-20 minutes until fruit is softened and juice has thickened into a syrup.
Place ricotta cheese, 1/4 cup honey, and lemon zest in a food processor and pulse until texture is smooth and airy, approximately 2 minutes.
Toast sourdough bread slices until edges are golden and center is crisp.
Spread a thick layer of whipped ricotta evenly across each slice of toast.
Top with warm roasted strawberries and a drizzle of the balsamic syrup from the pan.
Garnish with fresh mint and a pinch of flaky sea salt before serving.