Tuna Crostini

Preheat the baking sheet as well so the bread slices crisp up faster.

The finer you chop the onion, the creamier the spread will be.

Flake the tuna briefly with a fork so it combines better with the butter.

If the butter is still too firm, leave it at room temperature for 10 minutes or briefly warm it in the bowl.

Add the lemon juice gradually to avoid making the spread too sour.

For extra roasting flavor, flip the slices halfway through.

It's best to spread them only just before serving so the crostini stay crispy.