When choosing side dishes to serve with this easy casserole, keep that same simple theme in mind. Since the entreé includes a protein, vegetables, and carbohydrates all in one, a complicated side dish would only compete with casserole instead of complimenting it. Here are a few suggestions: Roasted fresh vegetables such as broccoli, cauliflower, Brussels sprouts, asparagus, or zucchini Green salad with a balsamic vinaigrette dressing Fresh fruit salad Roasted mushrooms Butternut squash or spaghetti squash