Step 1: In a large bowl, whisk together the olive oil, soy sauce, 1 tablespoon lemon juice, garlic powder, onion powder, paprika, salt, and pepper for the marinade.
Step 2: Add the chicken pieces to the marinade, ensuring they are well coated. Cover and refrigerate for at least 30 minutes, or up to 2 hours for maximum flavor.
Step 3: While the chicken marinates, prepare the creamy garlic sauce. In a small bowl, combine the sour cream, mayonnaise, minced garlic, parsley, and 1 teaspoon lemon juice. Mix well until smooth. Season with salt and pepper to taste. Refrigerate until ready to use.
Step 4: Preheat your grill to medium-high heat. If using wooden skewers, soak them in water for 30 minutes beforehand to prevent burning.
Step 5: Thread the marinated chicken pieces onto skewers, leaving a little space between each piece for even cooking.
Step 6: Place the skewers on the preheated grill and cook for 8-10 minutes, turning occasionally, until the chicken is cooked through and has nice grill marks (internal temperature should reach 165°F / 75°C).
Step 7: Remove the chicken from the grill and let it rest for a few minutes before serving.
Step 8: Serve the juicy grilled chicken bites with the creamy garlic sauce on the side for dipping. Garnish with extra parsley or lemon wedges if desired.