Cut a slit in the sausages and peel the skins off. Chop up the sausage meat, heat the oil in a large frying pan and add the sausage pieces.
Stir in the tomato paste, and fry for 2 minutes. Add the white wine; it will sizzle and then die down. When it does, add the tomatoes, capers, parsley and olives, stir, then simmer for about 15 minutes uncovered.
Serve over cooked, hot pasta; crumble some of the feta over each serving of pasta and sauce.
Notes
Get a spicy Italian-type sausage (a cooking sausage, not a preserved one like pepperoni or salami). Get a few big sausages rather than a bunch of little ones, to make the work go faster.Tin of tomatoes should be about 14 oz (400 g) in size. This will make enough sauce for about 3 cups (10 oz / 300 g) of pasta.Don't add salt to the sauce as it will be salty enough with the capers and the feta.