Pork Loin Steaks in Creamy Shallot and Mushrooms Sauce

pork loin steaks

olive oil

shallots, chopped

large field mushrooms or portobello mushrooms, chopped

rosemary sprigs, chopped

splash of cognac or brandy (optional)

stock, pork or chicken

whole-grain mustard

gr/ ⅔ cup creme fraiche or heavy cream

salt and pepper