Make the tzatziki base

• Add the plain Greek yogurt to a bowl
• Grate in the garlic clove
• Zest half the lemon, then juice half the lemon into the bowl
• Mix everything together

Prep the vegetables and herbs

• Chop the dill and add it to the bowl
• Dice the cucumber and add it
• Dice a quarter of the red onion, then chop it smaller and add it

Add the chicken and feta

• Shred the rotisserie chicken and add it to the bowl
• Crumble in the feta

Season and mix

• Add salt and pepper
• Mix everything together until well combined

Assemble the sandwiches

• Spoon the chicken salad between slices of bread
• Serve, or store the salad in the fridge for the next few days