Grilled Chicken Sandwich: Juicy and Charred

Ingredients

• 4 (150 g/5 oz each)boneless, skinless chicken breasts
• 30 mlextra-virgin olive oil
• 15 mlfresh lemon juice
• 10 gDijon mustard
• 5 ghoney
• 3 clovesgarlic, minced
• 5 gsmoked paprika
• 5 gkosher salt
• 2 gcracked black pepper
• 4brioche buns, split
• 60 mlmayonnaise
• 15 mlbasil pesto
• 4 slicesprovolone or Havarti cheese
• 1 largebeefsteak tomato, sliced
• 50 gfresh rocket
• 0.5red onion, thinly shaved

Instructions

1. 1

   Flatten the chicken

   Place the chicken breasts between two sheets of cling film. Use the flat side of a meat mallet to pound the thickest parts until each breast is an even 1.3 cm (½ inch) thick.

2. 2

   Mix the marinade

   In a large bowl, whisk together the olive oil, lemon juice, mustard, honey, garlic, smoked paprika, salt and pepper. Toss in the chicken to coat it thoroughly, then leave it at room temperature for 5–10 minutes.

3. 3

   Grill the chicken

   Heat the grill to medium-high, about 200°C (400°F), and oil the grates. Cook the chicken without moving it for 4–5 minutes per side. Put a cheese slice on each breast for the final 60 seconds so it melts, then remove the chicken when its internal temperature reaches 71°C (160°F).

4. 4

   Toast and assemble

   Toast the buns on the grill until their edges are darkened. Mix the mayonnaise and pesto, then spread the mixture over both cut sides of the buns. Layer the bottom halves with rocket, tomato, grilled chicken and red onion, then close the sandwiches.

What is a grilled chicken sandwich?

A grilled chicken sandwich is a familiar American-style meal built around seasoned chicken cooked over direct heat and served in a bun with toppings. This version adds a brief mustard, lemon and smoked paprika marinade for savoury flavour, with pesto mayonnaise to bring the components together.

The chicken is pounded to an even thickness, which helps it cook consistently on the grill. Tomato, rocket and shaved red onion add freshness and contrast to the soft brioche and melted cheese.

Nutrition and macros by portion

The nutrition label shows one serving as written: 672 calories, 45g protein, 36g carbs, 38g fat.

The chicken supplies most of the protein, while the brioche buns contribute much of the carbohydrate. Fat comes mainly from the olive oil, mayonnaise, cheese and brioche; tomato and rocket add freshness, so a simple side salad can balance the plate.

Why flatten the chicken?

Even thickness: pounding the thickest part of each breast makes it less likely that the thinner edges will dry out before the centre cooks. Keep the chicken between cling film to contain splashes.

A quick marinade

Mustard and lemon: Dijon, lemon juice, honey, garlic and spices coat the chicken with a balance of tangy, sweet and smoky flavours. The stated 5–10 minutes at room temperature is a short rest, not a long marinade.

Grilling and doneness

Hot grates: preheat to medium-high and oil the grill so the chicken can develop char and release more easily. Leave it undisturbed for 4–5 minutes per side rather than repeatedly turning it.

Check the centre: use a food thermometer to check the thickest part and follow the recipe's 71°C (160°F) removal temperature. Add the cheese for the last 60 seconds so it has time to melt.

Toast the buns before filling

Darkened edges: toasting the cut sides on the grill gives the buns a firmer surface and helps them stand up to the sauces and tomato. Keep an eye on them, as they can darken quickly over a hot grill.

Pesto mayo: mixing pesto into mayonnaise spreads the two flavours evenly across both halves. Assemble the sandwiches just before serving for the best contrast between warm chicken and fresh toppings.

Build a balanced plate

The sandwich has plenty of savoury richness from brioche, cheese and pesto mayonnaise, alongside the chicken and fresh vegetables. Serve it with a simple salad or extra grilled vegetables if you want more vegetables alongside it.

Recipe notes & tips

• Pound each breast evenly so it cooks at a similar rate from edge to centre.
• Oil the grill grates before cooking to help the chicken release cleanly.
• Keep the chicken still for the first 4–5 minutes on each side to encourage browning.
• Use a thermometer at the thickest part rather than judging doneness by colour alone.
• Toast the buns cut-side down and watch closely so the edges do not burn.
• Slice the onion thinly so it sits neatly in the sandwich.

Variations

• Swap the cheese: use provolone or Havarti, as listed, for a mild, melty topping.
• Change the greens: use another tender salad leaf in place of rocket.
• Adjust the sauce: add more or less pesto to the mayonnaise to suit your preference.
• Add extra char: leave the chicken on the grill until it has the level of browning you like, while checking its temperature.
• Make it sharper: add a little extra shaved red onion for more bite.

Common mistakes to avoid

• Uneven chicken: thick centres can take longer than the edges; pound each breast to an even 1.3 cm thickness.
• Moving it too soon: the chicken may stick or miss out on browning; leave it undisturbed for 4–5 minutes per side.
• Skipping the temperature check: appearance alone can be misleading; check the thickest part with a thermometer.
• Adding cheese too early: it may melt away before the chicken is done; place it on top for the final 60 seconds.
• Over-toasting the buns: they can burn on a hot grill; watch the edges and remove them once darkened.
• Assembling too far ahead: the buns can soften from the toppings; build the sandwiches shortly before serving.

How to store

For the best texture, assemble and eat the sandwiches straight away. Refrigerate leftover cooked chicken promptly in a sealed container and use within 3–4 days; store the buns and fresh toppings separately, then reheat the chicken until steaming hot before assembling.

Frequently asked questions