Medallions of pork with cranberry sauce and porto

Ingredients

• 1 tablespoon (15 ml) canola oil
• 2 pork tenderloins 7 oz (225 g), cut into medallions
• ½ white onion (or 1 yellow onion), sliced very thin
• 1 cup (250 ml) fresh or frozen cranberries
• 200 ml of porto
• 50 ml of liquid honey
• 2 tablespoons (30 ml) fresh rosemary (leaves only)
• Salt and fresh black pepper ground to taste