1 Make the garlic breadcrumbs
Heat olive oil in a skillet. Add a little garlic and breadcrumbs and cook until golden and crisp. Remove and set aside.
2 Cook the pasta
Cook tagliatelle in a large pot of salted boiling water until al dente. Reserve 1 cup of pasta water, then drain.
3 Build the base
In the same skillet, cook sausages (if using) for about 2 minutes. Add Swiss chard and cook for 1 minute until just wilted.
4 Emulsify the sauce
Add butter, cooked pasta, and about ½ cup reserved pasta water. Toss until the sauce emulsifies and coats the pasta evenly.
5 Finish and serve