Slice the baguette into 1/2-inch slices and brush the bread slices with olive oil on both sides. You should have around 20 slices.
Grill the bread slices on each side for a couple of minutes on an electric grill, a grill pan, or a regular grill. Alternatively, you can bake the bread slices at 360°F (180°C) for about 10-12 minutes in the oven.
(optional) If you want to make the candied walnuts at home, first chop the walnut halves into smaller pieces. Then, to a pan, add the sugar in one even layer and wait for it to melt (don’t stir). Once melted, add the nuts and give everything a mix for about 30 seconds. Then transfer the nuts to a plate covered with baking paper and separate them out.
Add the ricotta and honey to a bowl and whip for about a minute with a whisk.
Cut the strawberries into little bite-sized cubes.
Add the chopped strawberries, balsamic glaze, and arugula to a bowl, and mix everything.
Top the bread slices with the ricotta-honey mixture.
Add the strawberry mixture on top.
Place the candied walnuts on top of the crostini.