Preheat the oven to 400°F and prepare two baking sheets by lining them with parchment paper.
Lay the baguette slices in a single layer on the prepared baking sheets, ensuring they don’t overlap. Lightly brush both sides of each slice with extra-virgin olive oil, coating them evenly for a crisp, golden finish.
Transfer the baking sheets to the oven and bake for 10 to 12 minutes, or until the crostini turn a light golden brown and develop a crisp texture. Keep an eye on them to prevent over-browning.
Once out of the oven, immediately sprinkle with flaky sea salt to enhance the flavor. Serve warm or at room temperature with your choice of toppings. For inspiration, explore various topping ideas in the blog post.
Store any leftover crostini in an airtight container at room temperature for up to two days to maintain their crispness.