Step 1

Cook pasta in a large saucepan of boiling salted water until tender. Drain, reserving 2 cups of the cooking liquid.

Step 2

Melt butter in same cleaned pan; cook mushrooms, over medium heat, stirring until golden and tender.

Step 3

Return pasta to pan with onions and chicken. Stir in fetta, cream, tarragon and reserved cooking liquid; cook, stirring until creamy and heated through. Season to taste.

Step 4

Serve pasta topped with extra onions.