Grill 4 small pieces artisan bread at 200°C (392°F) until golden brown — just a few minutes. While you can toast the bread in a toaster, I use the grill as we'll be using the oven for the blueberries after.
Keep the oven at 200°C (392°F), but switch from grill to the conventional oven setting.
Line a baking tray with parchment paper. Add 120 g blueberries to the tray. Squeeze over ½ lemon (fresh) and then drizzle on 1 tablespoon pure honey. Mix the blueberries.
Bake the blueberries for around five minutes, or until the juices have leaked out and the blueberries have softened. Turn off the oven.
Spread 125 g mascarpone cheese over the toast, the top with the juicy blueberries.
Garnish the toast with 1 tablespoon roasted hazelnuts (peeled and halved), 3 sprigs fresh thyme, and flaked sea salt (to taste. You can also add lemon zest.