1-Getting started with Spinach And Cheese Stuffed Portobello Mushroom begins with prepping the mushrooms for marination. Mix 2 tablespoons of extra virgin olive oil, 1 tablespoon of balsamic vinegar, and 2 cloves of pressed garlic, then let the 4 large portobello mushroom caps soak in this blend for 15 minutes. This step infuses them with rich flavors and sets the stage for a delicious dish.

2-Next, preheat your oven to 450ºF and bake the marinated mushrooms for 10 minutes. While they cook, prepare the filling by mixing 10 ounces of defrosted and drained frozen chopped spinach with ¼ cup Parmesan cheese and 2 to 3 tablespoons of heavy cream. Season this mixture with coarse kosher salt and freshly ground black pepper for a tasty boost.

3-After the initial baking, flip the mushrooms and divide the spinach filling evenly among them. Top with 1 cup shredded mozzarella cheese and the remaining Parmesan cheese, then bake again for 10 minutes until the cheese melts and browns slightly. Serve warm with sides like mashed potatoes or grilled vegetables to complete the meal, making it ideal for home cooks and busy parents.