Boil or steam fresh green beans for roughly 3 minutes or until they are slightly cooked but still firm, drain liquid and set aside. In a pan, add butter, onion, white mushrooms, salt and pepper and stir until onions are translucent and start to brown. Add chicken stock and cream. Stir over medium high heat for 3 minutes and the sauce will begin to simmer. Add steamed and drained green beans and stir together. Empty pan into a baking dish and top with bacon bits and french fried onions. Bake for 20 minutes on a 375 F. oven.