For a bit more color and spring flavor, you can stir in 1 cup of thawed frozen peas or a handful of chopped green onions with the potatoes. If you prefer a different soup, cream of mushroom or cream of celery both work nicely and keep the recipe meatless for mixed church groups. Use Monterey Jack, Colby Jack, or a blend instead of cheddar for a slightly milder, extra-gooey casserole. For a little crunch, you can crumble 1–2 cups of cornflakes or crushed buttery crackers over the top along with an extra tablespoon or two of melted butter, but add them only for the last hour of cooking so they don’t get soggy. If you’re cooking for a smaller crowd, halve the recipe and use a 3–4 quart slow cooker, checking for doneness about 30 minutes earlier. To make it ahead, mix everything the night before, cover the bowl, and refrigerate; in the morning, transfer to the slow cooker insert and add an extra 30 minutes or so to the cook time since it will be starting cold.