Greek Shrimp Salad

Ingredients

• 1/3 cup plus 4 tablespoons extra-virgin olive oil
• 2 1/2 pounds tomatoes (cut into eighths)
• 1 red onion (quartered)
• 1 3/4 teaspoons kosher salt
• 1 teaspoon dried oregano
• 1 1/2 pounds shrimp (peeled and deveined)
• zest of 1 lemon
• 3 tablespoons lemon juice
• 3 teaspoons red wine vinegar
• 2 tablespoons mint (chopped)
• 1 head romaine lettuce (chopped)
• 1/2 red onion (slice)
• 1 to 2 English cucumbers (peeled, seeded and sliced)
• feta cheese (crumbled or cubed, to taste)
• pitted kalamata olives (to taste)