Greek Salad I

1 head romaine lettuce- rinsed

dried and chopped

1 red onion

thinly sliced

1 (6 ounce) can pitted black olives

1 green bell pepper

chopped

1 red bell pepper

chopped

2 large tomatoes

chopped

1 cucumber

sliced

1 cup crumbled feta cheese

6 tablespoons olive oil

1 teaspoon dried oregano

1 lemon

juiced

ground black pepper to taste