Greek Salad With Lemon And Oregano

Name: Greek Salad With Lemon And Oregano
Ingredients: 1/2 a large, seedless English cucumber (about 6 to 7 ounces), chopped; 1/2 a green bell pepper, chopped; 1 cup (about 6 ounces) cherry or grape tomatoes, halved; 1/4 cup kalamata olives (you can also serve these alongside); 1/4 small red onion, thinly sliced; 1 lemon, halved; 2 to 3 ounces feta (Bulgarian or French, if you can find them, are my favorites), in thick slices; 2 tablespoons olive oil, or more to taste; Salt and freshly ground black pepper; 1 spring oregano, leaves minced