Heat the olive oil in a large frying pan
Add the onion
Add the sausages
Cook for 5-6 minute until onions are soft and the sausages are brown
Add the garlic
Add the tomatoes, and sage
Cook for about 20 minutes at a gentle simmer
Meanwhile cook the pasta
Put the pasta in a large saucepan and cover with boiling water
Bring back to the boil, stir, turn down the heat and simmer for 12-15 minutes until soft
Serve the pasta onto plates then place the sausage and tomato mix on the bed of pasta.