Remove the loins from the refrigerator 30 minutes prior to cooking and wipe off most of the moisture.
Cut the loins diagonally to 1 cm fillets and drench in the flour. Shake to get rid of any excess flour and keep aside.
Set a large heavy bottom non-stick pan over medium heat and let it heat up for 2 minutes. Add 1 tablespoon the olive oil and 1 tablespoon of the butter and when the butter melts and foams add to the pan half of the fillets and sauté for 2-3 minutes each side. Remove from the pan and let rest covered with aluminium foil to keep warm. Repeat with the rest of the fillets and when done keep aside with the previously cooked ones.
Use the same pan and over high heat pour the wine. Let the alcohol evaporate and reduce to half and then add the chicken broth and the rosemary, and while on high heat let simmer rapidly until reduced to half.
Turn to low heat, add 1 tablespoon of butter and stir continuously for 2 minutes and until it reaches the consistency of a nice sauce. Finally season with the salt and pepper.
Pour over the Escalopes the sauce and serve with mushroom rice.