Preheat your oven to 350°F (175°C).
Prepare the pears by halving them and removing the cores.
In a mixing bowl, combine the mixed berries, honey, walnuts, and lemon juice.
Spoon the berry mixture into each pear half, filling generously.
Sprinkle the crumbled blue cheese over the filled pears.
Place the stuffed pears in a baking dish and cover loosely with aluminum foil.
Bake for about 25-30 minutes, until the pears are tender.
Remove the foil and bake for an additional 10-15 minutes to caramelize the topping.
Remove from the oven and let cool slightly before serving.