Preheat the oven to 350°. In a pie plate, toast the walnuts for about 5 minutes, until lightly browned. Let cool, then coarsely chop.
Light a grill or preheat a grill pan. Brush the eggplant slices with olive oil and season with salt and pepper. Grill the eggplant over moderately high heat until lightly browned and tender, about 2 minutes per side.
In a large skillet, melt the butter. Add the pear slices and cook over moderate heat, tossing, until just starting to soften, 3 minutes. Add the Cognac and toss the pears to coat thoroughly; remove from the heat.
In a small bowl, whisk 3 tablespoons of oil with the garlic, vinegar, 1 tablespoon of the parsley and 1/2 tablespoon of the chives. Season the vinaigrette with salt and pepper.
Arrange the eggplant slices on a platter and drizzle with the vinaigrette. Arrange the pear slices over the eggplant and drizzle with the honey. Scatter the walnuts, cheese and the remaining 1 tablespoon of parsley and 1/2 tablespoon of chives over the top. Serve.