Approx 300 g dried pasta, like penne, rigatoni or orecchiette • olive oil • garlic cloves, minced • salt • ground pepper • chili flakes • large red onion, sliced lengthwise • spicy Italian sausages • sun-dried tomatoes, sliced • shredded Parmesan cheese, with more for garnish • Approx 1 c fresh basil, coarsely chopped, and extra for garnish