Cut the chicken breasts in half inch slices and season with salt and pepper.
Heat olive oil in a large frying pan. Add the chicken and cook on both sides until it is golden and cooked through. Remove the chicken from the pan.
To the same pan add butter and garlic. Cook for 30 seconds and add the drained capers. Pour chicken stock, squeeze in about 2 tbsp of lemon juice and cook for a few minutes.
Return the chicken to the pan and cook for a couple of minutes. Taste whether you want to add more lemon juice. Garnish with fresh parsley and serve with rice or pasta.
Notes
You can use chicken thighs instead of chicken breast. Thighs are a bit more juicy than breast, but they have a bit more fat.