01 -
In a large skillet over medium heat, cook the bacon slices until crisp. Transfer bacon onto a paper towel-lined plate to remove excess grease, then roughly chop. Reserve all but 1 tablespoon of bacon drippings in the skillet.
02 -
Add butter to the bacon drippings in the skillet and melt over medium heat, stirring to deglaze any browned bits. Add diced onion and sauté until translucent. Stir in minced garlic and cook until fragrant and lightly browned.
03 -
Pour in white wine or chicken broth, scraping the skillet to incorporate any remaining caramelized bits from the bottom.
04 -
Stir in tomato paste until fully integrated. Add cherry tomatoes, salt, ground black pepper, Italian seasoning, and red pepper flakes. Simmer gently until tomatoes begin to soften.
05 -
Add the baby Bella mushrooms to the pan, stirring to coat them thoroughly in the sauce. Simmer on low for five minutes.
06 -
Reduce the heat further and slowly stir in heavy cream and shaved Parmesan. Blend until the sauce is smooth and unified. Incorporate the fresh spinach and the chopped bacon, stirring until the spinach has wilted.
07 -
Serve immediately as a flavorful side or atop pasta or potatoes.