Put a large frying pan over medium heat with Olive Oil (to taste) in the bottom. Add in Yellow Onion (1), Garlic (2 clove) and Bacon (2 slice). Cook, stirring occasionally until the onions start to soften.
Add in Chicken Breast (500 gram) and stir. Allow it to cook for five minutes.
Add in Dijon Mustard (1 tablespoon) to balance out the flavors, and stir it in. Reduce the heat slightly.
Add in Zucchini (2), Button Mushroom (200 gram). Stir. Allow it to cook for another five minutes, stirring occasionally.
Add Whipping Cream (1 1/2 cup) and stir it in. Keep stirring frequently until the sauce comes back to boiling point. When it is boiling, slightly reduce the temperature. Let it simmer until the sauce is reduced and stickened up.
Season with Salt and Pepper (to taste) and serve over Pasta (to taste).