Yes you can. To do so, toss 1/2 cup panko breadcrumbs (use them rather than regular breadcrumbs for max crispiness) with 3 tablespoons melted butter, sprinkle over the top after you sprinkle the final bit of cheese on top. And rather than covering the top with a lid to melt the cheese, pop the skillet into a 400F oven for about 10 minutes to melt the cheese and crisp up the crumbs. This can also be done under the broiler (keep a very close eye on it, it'll only take 2-3 minutes!) provided you're using an oven-safe skillet. Or transfer everything first into an oven-safe casserole dish or baking dish.