Pork Tenderloin With Apples and Onions without balsamic

1 lb pork tenderloin, trimmed, cut into 1-inch-thick slices 5 tablespoons butter 4 medium golden delicious apples , peeled, cored, sliced 1/3 inch thick[...]

2 pork tenderloin, trimmed of excess fat and silver skin (1 1/2 to 2 pounds total) 2 tablespoons olive oil coarse salt and pepper 2 leeks , white and[...]

1/2 teaspoon salt 1/4 teaspoon ground cinnamon 1/4 teaspoon ground cardamom 1/8 teaspoon black pepper 1 large sweet potato , in 1-inch slices (peeled or not)[...]