Preheat oven to 350°F. Lightly butter a large 9x13-inch casserole dish. If using frozen corn, steam and drain the kernels. If using fresh, scrape kernels off the cob. Beat the egg, cream, and brown sugar in a large bowl until just blended. Stir in chives and nutmeg. Season to taste with salt and pepper. Stir in corn kernels. Combine 1 cup of the crumbled Ritz crackers with 6 tablespoons of the melted butter. Add to the corn mixture. Stir until combined. Pour into the casserole dish. Toss remaining cracker crumbs with the remaining 2 tablespoons melted butter. Sprinkle buttered crumbs over the top of the pudding. Bake uncovered until golden brown and slightly firm to the touch, about 45 minutes. Optional: Garnish with more snipped fresh chives.