To keep this dish strictly keto, always choose a marinara or tomato sauce with no added sugars and a low net carb count per serving. The eggplant can also be grilled instead of roasted by brushing the slices with olive oil and cooking them over medium heat until tender and charred, which adds a smoky flavor. This bake reheats well, so it is ideal for meal prep; store leftovers in an airtight container in the refrigerator for up to 5 days or freeze portions for up to 2 months. Serve with a simple green salad dressed in olive oil and vinegar to keep the entire meal low carb and satisfying.