Shrimps with teriyaki sauce

We need 500grams of peeled and clean shrimp 2 large size onions cut into quarters 2 large green peppers cut into quarters 5 cloves of garlic shredded 3 tablespoons olive oil Salt and pepper 1/2 cup of teriyaki sauce 2 tablespoons of tomato paste 1 tablespoon of corn flour 2 tablespoons of water 1 small lemon juice 1 tablespoon garlic powder 1 tablespoon onion powder Can add if u want 2 tablespoons of oyster sauce