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A quick and flexible sandwich featuring juicy seasoned chicken breasts, creamy avocado slices, melted cheese, and crispy toasted bread, perfect for brunch, lunch, or a main course.

  • Total Time: 30 minutes
  • Yield: 2 sandwiches 1x

Ingredients

Scale
  • 2 boneless skinless chicken breasts
  • Salt and pepper to taste
  • 1 tablespoon olive oil
  • 1 avocado sliced
  • 4 slices of your favorite cheese (Swiss, cheddar, or provolone recommended)
  • 4 slices of bread (sourdough, ciabatta, or your choice)
  • 2 tablespoons mayonnaise
  • 1 tablespoon Dijon mustard
  • 1 small red onion thinly sliced
  • 1 tomato sliced
  • Butter or olive oil for grilling the sandwiches

Instructions

  1. Pat chicken breasts dry and season both sides with salt and pepper.
  2. Heat 1 tablespoon olive oil in a skillet over medium-high heat until shimmering.
  3. Cook chicken 6–7 minutes per side or until internal temperature reaches 165°F (74°C) and no pink remains.
  4. Remove chicken from skillet and let rest 4–5 minutes, then slice thinly.
  5. Slice avocado and tomato and thinly slice the red onion; optionally brush avocado with lemon or lime juice to prevent browning and have cheese slices ready.
  6. Spread a thin layer of mayonnaise and Dijon mustard on each slice of bread.
  7. On two bread slices, layer sliced chicken, avocado, and cheese, then add red onion and tomato; top with remaining bread slices mayo side down.
  8. Heat a clean skillet or grill pan over medium heat and add butter or olive oil.
  9. Place sandwiches in the pan and cook 3–4 minutes per side until bread is golden and cheese is melted, pressing gently with a spatula or using a panini press for even melting.
  10. Transfer sandwiches to a cutting board, let rest for 1 minute, then slice in half and serve warm.

Notes

Store sandwiches in an airtight container in the refrigerator., For best results when reheating, use a toaster oven or regular oven at 350°F (175°C) for 8–10 minutes to maintain bread crispiness., Avoid microwaving if possible as it makes the bread soggy; if microwaving, do so briefly and finish reheating in a skillet or toaster oven., Cook and slice chicken ahead and assemble sandwiches just before grilling to keep avocado and tomato fresh., Avoid freezing fully assembled sandwiches due to avocado and bread texture changes; however, cooked chicken can be frozen for 2–3 months.

  • Author: Ashley
  • Prep Time: 10 minutes
  • Cook Time: 20 minutes
  • Category: Main Course
  • Cuisine: American

Nutrition

  • Serving Size: 1 sandwich
  • Calories: 512 kcal per serving
  • Fat: Approximately 28g per serving (from avocado, cheese, mayonnaise, and olive oil)
  • Carbohydrates: Approximately 30g per serving (from bread and vegetables)
  • Protein: Approximately 40g per serving (from chicken and cheese)