Ratatouille with Curry

Name: Ratatouille with Curry
Ingredients: 2 tablespoons olive oil; 2 cups cubed eggplant; 2 cups cubed zucchini; 1 cup diced onion; 1/2 cup diced celery; 1/2 cup diced red bell pepper; 1/2 cup cider vinegar; 5 tablespoons tomato paste; 4 cloves garlic, minced; 1 teaspoon curry powder; 1 teaspoon salt, or to taste; 1/2 teaspoon dried oregano