Heat olive oil in large nonstick skillet. Sear chicken in skillet to brown
on each side. Remove chicken from skillet and set aside.
In same skillet melt butter. Add garlic and brown. Add flour and brown.
Add sour cream and yogurt. Mix to make sauce. Add scallions and all except 4
slices of the gouda cheese. Simmer until cheese melts. Return chicken to skillet
and simmer about 30 minutes until chicken is cooked through.
To serve, place over cooked pasta. Add pasta to plate, Spoon sauce over
pasta, then place a chicken breast on top.
Just before serving place the last
4 slices of gouda on the 4 breasts and allow to melt slightly.