1: Cook the pasta according to package instructions.
2: In a pan, melt the butter and olive oil over medium heat.
3: Add garlic and sauté until fragrant.
4: Add mushrooms and cook until tender.
5: Stir in the chicken bouillon cube and flour.
6: Add the heavy cream and pasta water, stirring to combine.
7: Mix in harissa and season with salt and pepper to taste.
8: Add cooked pasta and spinach to the sauce, tossing to coat.
9: Squeeze fresh lemon juice over the top.
10: Serve with grated Parmesan cheese.
