Horiatiki Salata (Hearty Greek Salad)

Ingredients

• 1 3/4 pounds tomatoes, cored
• 1 1/4 teaspoons table salt, divided
• 1/2 red onion, sliced thin
• 2 tablespoons red wine vinegar
• 1 teaspoon dried oregano, plus extra for seasoning
• 1/2 teaspoon pepper
• 1 English cucumber, quartered lengthwise and cut into ¾-inch chunks
• 1 green bell pepper, stemmed, seeded, and cut into 2 by ½-inch strips
• 1 cup pitted kalamata olives
• 2 tablespoons capers, rinsed
• 5 tablespoons extra-virgin olive oil, divided
• 1 (8-ounce) block feta cheese, sliced into ½-inch-thick triangles