Remove from heat. Fold in whipped cream. Add salt and pepper to taste.
For each Hot Brown, place 2 slices of toast on a metal (or flameproof) dish. Cover the toast with mushrooms and thinly sliced tomatoes, then cover with a liberal amount of turkey. Pour a generous amount of sauce over the turkey and toast. Sprinkle with additional Parmesan. Place entire dish under a broiler until the sauce is speckled brown and bubbly. Remove from broiler, cross 2 pieces of bacon on top and serve immediately.