Pork Tenderloin With Apples and Onions without fennel spice

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[...]

1/4 cup balsamic vinegar 2 tablespoons maple syrup 3 medium red apples , halved and cored, each cut into 8 wedges 1 large red onion , halved and sliced into[...]