Begin by marinading the chicken. Whisk together soy sauce, olive oil, lemon juice, paprika, dill, ginger, garlic and pepper. Add diced chicken to bowl or bag along with the marinade, cover and marinate for 20 minutes up to 8 hrs.
Next make the Tzatziki Dressing. Combine yogurt with cucumber, garlic, dill, olive oil, lemon juice, salt and pepper. Stir until well combined. Taste and add more salt if needed. Store in jar or bowl in fridge until ready to eat. Up to one week before.
Pour chicken and sauce into skillet and cooke over medium high heat until each piece is cooked through, 5-7 minutes, turning to evenly cook each pieces 2-3 times while cooking.
Make salad by combining romaine, bell pepper, cucumbers, red onion and feta in a large bowl. Toss together with Tzatziki Dressing. Transfer and divide into serving bowls. Top with chicken and more feta and dressing if desired.