Grilled Portobella on Ciabatta

Ingredients

• 60 mlmayonnaise
• 2.5 mlfinely chopped fresh garlic
• 1.25 mlcoarsely ground black pepper
• 0.625 mlsalt
• 60 ml, meltedbutter
• 4ciabatta rolls, split
• 4 medium, about 10 cm in diameter, stems removedportobello mushrooms
• to tastesalt
• to tastepepper
• 8 slices, about 21 g eachItalian blend cheese
• 1 jar (340 g), drainedroasted red peppers
• about 20 grocket leaves

Instructions

1. 1

   Heat the grill

   Heat a gas grill to medium, or prepare a charcoal grill until the coals are covered with white ash. Mix all the aioli ingredients in a small bowl and set aside.

2. 2

   Butter the rolls

   Brush 2 tablespoons of the melted butter over the cut sides of the rolls and set them aside.

3. 3

   Grill the mushrooms

   Brush the remaining butter over the mushrooms and season with salt and pepper if desired. Put them on the grill smooth-side down and grill, turning once, for 6–8 minutes, or until tender. Place 2 cheese slices on each mushroom and grill for a further 2–3 minutes, until the cheese has melted.

4. 4

   Toast the ciabatta

   Place the rolls on the grill cut-side down and toast for 1–2 minutes.

5. 5

   Assemble the sandwiches

   Spread each toasted top half with 1 tablespoon of aioli. Put one quarter of the roasted red peppers on each toasted bottom half, then add a grilled mushroom, one quarter of the rocket leaves and the top half of the roll.

What is a grilled portobello ciabatta?

Portobello mushrooms are large, mature mushrooms whose broad caps make a substantial filling for sandwiches. This Italian-inspired combination pairs them with ciabatta, roasted peppers, cheese and rocket.

Grilling gives the mushrooms direct heat while the cheese melts on top. Garlic aioli adds a creamy, savoury layer to balance the sweet peppers and peppery leaves.

Nutrition and macros by portion

The nutrition label shows one serving as written: 590 calories, 17g protein, 45g carbs, 37g fat.

The ciabatta and roasted peppers provide most of the carbohydrates, while butter, mayonnaise and cheese contribute much of the fat. The cheese and mushrooms provide protein. Serve with a crisp salad or extra vegetables for a fresh contrast.

Choosing the ingredients

Mushrooms: Choose caps that are roughly 10 cm across so they fit the rolls. Removing the stems helps them sit flat on the grill.

Ciabatta: Split the rolls before grilling so the cut surfaces toast quickly and hold the fillings. A sturdy roll is useful for containing the mushroom and peppers.

Peppers and cheese: Drain the peppers well to keep the bread from becoming soggy. The Italian blend cheese melts over the mushroom and brings a savoury finish.

Making the garlic aioli

Stir the mayonnaise, garlic, pepper and salt together before grilling. This gives the garlic time to mingle with the creamy base while the other components cook.

Spread the aioli on the toasted top halves, as directed, rather than putting it directly against the hot grill. This keeps the sauce creamy and avoids making the bread greasy.

Grilling mushrooms evenly

Start the caps smooth-side down and turn them once during the 6–8 minutes of grilling. Keep the heat at medium for a steady cook that tenderises the mushrooms without scorching their surfaces.

Add the cheese only after the mushrooms are tender, then grill for another 2–3 minutes. The cheese is ready when it has melted over the caps.

Getting the texture right

Tender mushrooms and melted cheese make the warm centre of the sandwich, while toasted ciabatta gives it structure. Toast the rolls for just 1–2 minutes, watching closely so the cut sides do not burn.

Drain the peppers thoroughly and add the rocket just before serving. That keeps the bread from absorbing excess liquid and the leaves fresh.

Serving the sandwiches

Assemble each sandwich with one quarter of the peppers and rocket, plus one mushroom and two cheese slices. Serve soon after assembling, while the mushroom and cheese are still warm.

A crisp green salad or a simple vegetable side works well alongside the rich, buttery rolls. The sandwich is also substantial enough to serve on its own.

Recipe notes & tips

• Drain the roasted peppers well before assembling the sandwiches.
• Keep the mushrooms smooth-side down at the start of grilling.
• Turn the mushrooms just once so they cook evenly.
• Add the cheese only once the mushrooms are tender.
• Watch the ciabatta closely as it toasts because it needs only 1–2 minutes.
• Assemble the sandwiches shortly before serving to keep the rocket fresh.

Variations

• Add fresh herbs: Stir chopped basil into the aioli for an aromatic note.
• Use another cheese: Choose a similar melting cheese if Italian blend is unavailable.
• Add balsamic: Drizzle a little balsamic vinegar over the peppers for extra tang.
• Make it spicy: Add chilli flakes to the aioli to bring gentle heat.
• Swap the greens: Use baby spinach instead of rocket for a milder leaf.

Common mistakes to avoid

• Wet peppers: Excess liquid can soften the bread; drain them thoroughly before assembling.
• Overcooked rolls: Ciabatta can char quickly; toast it for 1–2 minutes and keep an eye on it.
• Cheese added too soon: It may melt before the mushrooms are tender; wait until the end of the mushroom grilling.
• Uneven grilling: Caps that do not sit flat may cook inconsistently; remove the stems and place them smooth-side down.
• Soggy rocket: Adding the leaves too early can wilt them; assemble just before serving.

How to store

Store leftover components separately in sealed containers in the fridge and use within 3 days. Reheat the mushrooms and cheese on a grill or in a pan until hot, then assemble with freshly toasted bread, peppers and rocket.

Frequently asked questions