I’m adding more meatless meals to our weekly menu, so I developed a simple, flavorful recipe for roasted portobello mushrooms stuffed with spinach and tomatoes. I sautéed grape tomatoes and baby spinach with garlic and a splash of balsamic, filled the mushroom caps, topped them with seasoned panko and Parmesan, and roasted until tender and golden. The result was a satisfying main course with a pleasant contrast of juicy vegetables, savory mushroom, and a crispy breadcrumb topping. These mushrooms pair nicely with a loaded Caesar salad or crusty olive bread for a complete, meatless dinner.
Roasted Portobello Mushrooms Stuffed with Spinach and Tomatoes
Ingredients:
- 1 tbsp olive oil, plus extra for brushing the mushrooms
- 1 cup grape tomatoes
- Pinch of crushed red pepper flakes (optional, to taste)
- 5 oz baby spinach, washed
- 1 tbsp balsamic vinegar
- 2 cloves garlic, minced
- Sea salt and freshly cracked black pepper, to taste
- 4 large portobello mushroom caps, stems and gills removed
- Italian seasoned panko crumbs, to taste
- Parmesan cheese, shredded, to taste
- Fresh parsley, chopped, for garnish
How to Make Roasted Portobello Mushrooms Stuffed with Spinach and Tomatoes
- Preheat the oven to 400°F (about 200°C). Line a baking sheet with foil or parchment and lightly spray or brush it with oil so the mushrooms don’t stick.
- Heat 1 tablespoon of olive oil in a sauté pan over medium heat. Add the grape tomatoes and a pinch of crushed red pepper flakes if you like a little heat. Cook, stirring occasionally, for 1–2 minutes until the tomatoes begin to soften and blister.
- Add the washed spinach, balsamic vinegar, and minced garlic to the pan. Season with sea salt and freshly cracked black pepper. Stir continuously for about a minute until the spinach wilts and the flavors combine. Remove the pan from the heat and let the mixture cool slightly so it’s easier to spoon into the mushrooms.
- Prepare the mushrooms: use a spoon to remove the gills from the underside of each portobello cap if they haven’t already been removed. Wipe the caps with a paper towel and brush both the inside and outside lightly with olive oil. Season the mushroom surfaces with a little sea salt and black pepper.
- Spoon the spinach-and-tomato mixture evenly into each mushroom cap, packing it lightly so the filling sits neatly in the cavity. Top each filled mushroom with a generous sprinkle of Italian-seasoned panko crumbs and a scattering of shredded Parmesan cheese for flavor and crunch.
- Arrange the stuffed mushrooms on the prepared baking sheet and roast in the preheated oven for 15–20 minutes. The mushrooms should be tender and the topping golden. If you prefer a crispier crust, turn the oven to broil for the last 1–2 minutes while watching closely to prevent burning.
- Remove the mushrooms from the oven and let them rest for a few minutes. Transfer to a serving plate, garnish with chopped fresh parsley, and serve warm. Enjoy immediately for the best texture and flavor.
Tips and variations: For extra richness, stir a spoonful of cream cheese, goat cheese, or ricotta into the spinach mixture before filling the mushrooms. If you want a vegan version, omit the Parmesan and use nutritional yeast or a vegan breadcrumb topping. Add chopped sun-dried tomatoes or roasted red peppers with the spinach for a bolder flavor. Serve the mushrooms as a main course alongside a crisp green salad and crusty bread, or serve them as a hearty appetizer sliced into wedges.
Make-ahead and storage: You can prepare the filling in advance and refrigerate it for up to 24 hours. Stuffed but uncooked mushrooms can be assembled and kept covered in the fridge for a few hours before roasting. Leftovers store well in an airtight container in the refrigerator for 2–3 days; reheat gently in a 350°F oven until warmed through to preserve texture.
These roasted portobello mushrooms make a simple, elegant weeknight meal or an attractive vegetarian main for guests. The quick sauté of tomatoes and spinach keeps the filling bright and flavorful while the panko-Parmesan topping adds satisfying texture.