Ingredients:
- 1 pound beef sirloin, cut into thin strips
- 1 tablespoon olive oil
- 2 tablespoons butter
- 1/2 cup chopped onion
- 1/2 cup sliced mushrooms
- 2 cloves garlic, minced
- 1/4 cup beef broth
- 1/4 cup sour cream
- 1/4 cup heavy cream
- Salt and pepper, to taste
- 2 tablespoons chopped fresh parsley, for garnish

Instructions:
- Heat the olive oil in a large skillet over medium-high heat. Add the beef strips and cook for 3-4 minutes, or until browned on all sides. Remove the beef from the skillet and set aside.
- Add the butter to the same skillet and melt it over medium heat. Add the chopped onion and sliced mushrooms and cook until they are soft and tender, about 5 minutes.
- Add the minced garlic to the skillet and cook for 1 minute, or until fragrant.
- Pour in the beef broth and stir to combine. Add the beef strips back to the skillet and simmer for 5 minutes, or until the beef is cooked through.
- Remove the skillet from the heat and stir in the sour cream and heavy cream. Season with salt and pepper, to taste.
- Garnish with chopped fresh parsley and serve hot.
This dish is delicious on its own or served over cauliflower rice or zucchini noodles to keep it keto-friendly. Enjoy!