"Improve this recipe into a healthy, filling pasta dish for 4 people with enough protein. Keep the core idea of roasted caramelized red onions, sun-dried tomatoes, hummus, herbs, lemon, and pasta, but make it more balanced and protein-rich. Use metric units only. Please optimize for nutrition, satiety, and flavor, and include a clear ingredient list and step-by-step method. Consider adding a good protein source such as chickpeas, lentils, tofu, Greek yogurt, cottage cheese, or another suitable option, and suggest a whole-grain or high-protein pasta if appropriate. Keep it practical and home-cook friendly."