Pizza Stuffed Portobello Mushrooms

Ingredients

• 2portobello mushrooms, gills and stems removed
• 30 g (1 cup)spinach leaves
• 120 ml (½ cup)prepared marinara sauce
• 200 g (2 cups)shredded mozzarella cheese
• 15 ml (1 tablespoon)Italian seasoning
• 8–10cherry tomatoes, sliced
• 5–6olives, sliced
• to tasteParmesan cheese, slivered
• for garnishbasil

Instructions

1. 1

   Preheat the oven

   Heat the oven to 200°C (400°F).

2. 2

   Fill the mushrooms

   Set the mushrooms on a baking sheet with their stem sides facing up. Divide half of the spinach leaves, ¼ cup of the marinara sauce and 1 cup of the shredded mozzarella between the mushrooms. Add half of the Italian seasoning, followed by half of the sliced tomatoes and olives.

3. 3

   Bake and garnish

   Bake for 15 minutes. Take the mushrooms out of the oven and finish with Parmesan, basil and extra marinara sauce if desired.

What are pizza stuffed portobello mushrooms?

Portobello mushrooms are large, mature mushrooms with broad caps that can hold a filling. This version borrows the tomato, cheese and herb flavours of pizza, using the mushroom as the base instead of dough.

The combination works because the savoury mushroom pairs well with tangy marinara and rich, melting mozzarella. Spinach, tomatoes and olives add colour and contrasting flavours.

Nutrition and macros by portion

The nutrition label shows one serving as written: 250 calories, 17g protein, 8g carbs, 17g fat.

Mozzarella and Parmesan provide much of the fat and protein, while the marinara, tomatoes and spinach contribute most of the carbohydrates. Serve a mushroom portion with salad or extra vegetables to add volume and balance the plate.

Choosing the mushrooms

Cap size: Look for mushrooms that are fairly even in size so the filling is easier to divide. Removing the gills and stems creates room for the toppings.

Layering the filling

Sauce and spinach: Keep the filling inside the cap, spreading the marinara over the spinach rather than letting it spill onto the tray. The recipe divides the listed toppings between the mushrooms.

Cheese and toppings: Mozzarella melts over the filling, while tomatoes and olives sit on top. Slice them evenly so they are easy to distribute.

Getting the texture right

Mushrooms release moisture as they bake, so a little liquid on the baking sheet is normal. The caps are ready after the stated 15 minutes when they are tender and the cheese has melted.

Serving the mushrooms

Serve them hot, straight from the oven, with a green salad or cooked vegetables for a lighter accompaniment. Bread, potatoes or grains make the meal more substantial.

Finishing touches

Parmesan and basil go on after baking, keeping the herbs fresh and adding a savoury finish. Add extra marinara at the table if you like a saucier result.

Recipe notes & tips

• Choose mushrooms of a similar size so they cook at roughly the same rate.
• Slice the tomatoes and olives before you start filling the caps.
• Divide the toppings evenly to avoid leaving one mushroom with most of the filling.
• Use a baking sheet with a rim to catch liquid released by the mushrooms.
• Add the Parmesan and basil after baking, as directed.

Variations

• Add pepperoni: Scatter a little sliced pepperoni over the mozzarella before baking.
• Use another cheese: Swap some of the mozzarella for a cheese that melts well.
• Make it spicy: Add chilli flakes to the marinara or sprinkle them over the finished mushrooms.
• Change the olives: Leave them out or use a different variety to suit your taste.
• Add extra vegetables: Include finely sliced peppers with the tomatoes.

Common mistakes to avoid

• Overfilling the caps: Divide the toppings between the mushrooms so the filling stays in place.
• Using uneven mushrooms: Choose caps of similar size for more consistent baking.
• Adding too much sauce: Use the listed amount in the filling and serve any extra on the side.
• Expecting the caps to stay dry: Mushrooms release moisture as they cook, so use a rimmed baking sheet.
• Adding basil before baking: Garnish after the mushrooms come out of the oven to keep it fresh.

How to store

Refrigerate leftovers in a covered container for up to 3 days. Reheat in the oven until hot throughout; the mushrooms will be softer after storage.

Frequently asked questions