In a small bowl, combine the paprika, thyme, nutmeg, cardamom, salt and pepper to make a spice mix. Generously coat the chicken cubes with the spice mix.
Place the chicken cubes in a deep dish with the sliced yellow onions and olive oil. Combine the minced garlic and lemon juice and add them to the chicken dish. Toss the chicken making sure it is well coated. Cover and refrigerate for 2-4 hours or overnight.