Greek Salad Layered Dip

large tomatoes, diced*

long English cucumber, diced*

red onion, minced

large yellow bell pepper, diced

red bell pepper, diced

crumbled feta cheese, divided

+ 1/2 tbsp dried oregano, divided

finely chopped parsley, divided

Greek yogurt, plain

Romaine lettuce, shredded

Kalamata olives, pitted & sliced*

Ground black pepper,