Cut chicken breast into cube shapes.
Season the chicken with salt, pepper, paprika powder, and oregano.
Mix Greek yogurt, lemon juice, and minced garlic to make a marinade sauce.
Marinate the chicken in the sauce for 30 minutes.
Heat olive oil in a pan and cook the chicken over medium heat.
Flip once to cook until golden brown.
Place the grilled chicken on a plate and, if desired, serve with Greek yogurt.