Preheat the oven to 190°C (375°F).
Rub the chicken breasts with olive oil, lemon juice, salt, and black pepper.
Place the chicken breasts in a baking dish and roast in the preheated oven for 20-25 minutes, or until cooked through. Allow to cool, then shred into bite-sized pieces.
In a mixing bowl, combine mayonnaise, mild curry powder, Madras curry powder, mango chutney, lemon zest, cinnamon, sultanas, dried apricots, sugar, tomato purée, and grated ginger.
In a saucepan over medium heat, melt the butter and sauté until soft.
Add the shredded chicken to the saucepan with the butter and stir to coat.
Pour the curry sauce mixture over the chicken and stir until well combined.
Allow the flavors to meld together for a few minutes.
Serve the Coronation Chicken garnished with fresh coriander leaves.
Optional: Top with flaked almonds and a dollop of Greek yogurt, if desired.