1️⃣ Sauté the aromatics:
🔸 Heat a large skillet over medium-high heat.
🔸 Melt butter, then sauté onion until soft & transparent.
🔸 Add garlic and cook for 1 minute until fragrant.

2️⃣ Cook the mushrooms & tomatoes:
🔸 Add sun-dried tomatoes (with 1 tbsp reserved oil) and cook for 2 minutes.
🔸 Stir in mushrooms, cooking for 5 minutes until softened.

3️⃣ Deglaze & simmer the sauce:
🔸 Pour in white wine (if using) and let it reduce by half. (Skip if preferred.)
🔸 Lower heat and stir in heavy cream, salt, and pepper.
🔸 Let it simmer gently, stirring occasionally.

4️⃣ Add spinach & cheese:
🔸 Stir in spinach and let it wilt in the sauce.
🔸 Mix in Parmesan cheese, stirring until melted.

5️⃣ Thicken (optional):
🔸 For a thicker sauce, add cornstarch mixture and stir until smooth.

6️⃣ Finish & serve:
🔸 Sprinkle with Italian herbs and fresh parsley.
🔸 Serve over mashed cauliflower, zucchini noodles, pasta, or rice.