Preheat the oven to 350 degrees F.

In a small bowl, mix together the hot water and chicken stock; dissolve the bouillon cube into this mixture. Pour this into the base of a roasting pan and place a roasting rack over top. Place the hams in the centre of the rack, drizzle with the maple syrup, and cover with foil.

Place in the preheated oven for about 25 to 30 minutes, or until the hams are warmed through. Baste hams halfway through to keep them from drying out.

Meanwhile, start on the dressing. Cut the bread into roughly 1/2-inch cubes. Place in a large mixing bowl and set aside.

Melt 4 tablespoons butter in large, heavy skillet over medium-high heat. Add onion and celery; saute until tender and beginning to brown, about 10 minutes. Season lightly with salt and pepper. Add apples; cook until tender and beginning to brown, another 10 minutes. Stir in mushrooms and saute until tender, about 3 minutes. Add the bread cubes, mix gently until well incorporated, and reduce heat to low.

Melt 3 tablespoons of butter in another pan over medium heat. Add herbs and toast over low heat for about 5 minutes, until fragrant. Remove from heat and pour over the bread mixture, mixing everything together over low heat. Cover.

Remove ham from the oven. Immediately pour the liquid from the pan over the dressing and simmer, covered, for 5 minutes or until all the liquid has been absorbed. Let the ham rest for a few minutes in the meantime.

Slice ham and serve immediately alongside the dressing.