Trim off the stem of each pear, then cut it in half from top to bottom.
Using a paring knife or a small spoon, remove the core and its seeds, creating a small well in the center of each half pear.
Place the pear halves in a baking dish lined with parchment paper. Sprinkle them with sugar and a few drops of freshly squeezed lemon juice. Let the pears macerate for about 15 minutes, at least until the sugar melts.
Bake the pears in a moderate (180C/350F) oven for 20 minutes or so, until tender but not falling apart.
Take the bakinig dish out of the oven and place a knob of gorgonzola cheese in the well of each half pear, then top with a walnut half or two.
Return the pears to the oven and continue baking just long enough to melt the cheese, perhaps 5 minutes.
Remove the pears from the oven and let them cool. Serve slightly warm or at room temperature, drizzled with honey.