In a bowl, mix together the paprika, garlic granules, olive oil, salt and pepper and mix well.
Use the tip of your fingers to rub the paprika mixture onto the chicken breast, making sure it is coated well and set aside for 10 minutes.
Preheat the oven to 200 degrees Celsius ( 390 degrees Fahrenheit).
Place the chicken into an oven-proof dish and cover with foil.
Bake for 25 minutes, then remove the foil and leave to bake for a further 10 minutes. Check the chicken, as you might have to remove it earlier, depending on its size.
Remove from the oven and slice the chicken breast and leave to cool.
To make the salad, mix the spinach, chicken, sliced apple and halved cucumber slices.
To make the dressing, combine the lemon juice, olive oil, dijon mustard and salt and drizzle over the salad. Serve immediately!