Pork Tenderloin in Pan Sauce without apricots sugar

3 -4 tablespoons butter 3 tablespoons oil 2 cups sliced mushrooms 2 medium onions , chopped 1 tablespoon fresh garlic , chopped 2 small red bell peppers ,[...]

salt 1 lb pappardelle pasta or 1 lb fettuccine 2 pork tenderloin, trimmed (1 1/2-1 3/4 lb, total wt.) black pepper 1/2 cup all-purpose flour 2 tablespoons[...]