Instant Pot Ratatouille

Name: Instant Pot Ratatouille
Ingredients: 1 large zucchini (sliced into thin circles); 1 medium eggplant (sliced into thin circles); 2 medium tomatoes (sliced into thin disks); 1 small red onion (sliced into thin circles or 1/2 large red onion, halved and sliced into half moons); 2 large cloves of garlic (finely diced); 1 tablespoon of dried thyme; 1 teaspoon sea salt; 1/2 teaspoon black pepper; 2 tablespoons aged balsamic vinegar (sweet balsamic or regular); 3 tablespoons olive oil; 1 cup water