Rinse the breasts, pat dry, season with salt and pepper. Wrap each with a slice of bacon and secure with the sprig of rosemary.
Peel and cut the onions, wash and halve the grapes.
Fry the breasts in the butter until golden brown. Take out and keep warm.
Now sauté the onions in the frying fat, sauté halved grapes for about 5 minutes. Then deglaze with broth and stir in the sour cream. Add the warm meat again and let it steep for another 5 minutes.
It goes well with baguette, walnut or potato bread.