Heat oven to 400° F. Heat saute pan over medium-high heat; add olive oil. Season pork tenderloin with salt and pepper, to taste, and sear on all sides until brown.

In same pan, add carrots, apples, potatoes and leek. Reduce heat to medium and cook 3 minutes until vegetables have some color.

Deglaze pan with apple cider, apple cider vinegar and brown sugar.

Put pan in oven and cook 15 minutes. Remove pan from oven.

Remove pork from pan and let rest on cutting board. Put saute pan with vegetables and liquid back in oven 3 minutes until liquid is reduced and syrupy. Vegetables should be well glazed when finished.

Slice pork and plate. To serve, place glazed vegetables and pan drippings over meat.