Use seasonal vegetables for the best flavor. Feel free to experiment with other veggies, like spinach or mushrooms. Make ahead: You can prepare the lasagna a day in advance and store it in the refrigerator, baking it just before serving. For extra protein, mix in some cooked ground beef or chicken from recipes like High Protein Chicken Salad or Crispy Garlic Chicken Fried Rice. You can easily make a gluten-free version by using gluten-free lasagna noodles.