Toss scallops with melted butter, garlic, shallots, nutmeg, salt, and pepper in a medium bowl. Transfer to a shallow casserole dish. Combine extra-virgin olive oil and bread crumbs. Scatter bread crumbs over scallops and place in the casserole. Bake scallops 10 to 12 minutes or until bread crumbs are deep golden and scallops are opaque.