Cook spaghetti pasta according to package direction but reduce cooking time by 1 minute. Save 2 cups pasta water to another bowl.
In a pan sauté chopped onion with oil until onion is soft and translucent. Then add garlic and stir for 1 minutes. Add tomato paste and stir for 2 minutes.
Add shrimp and cook only for 1 minutes.
Add cooked spaghetti pasta, pasta water, chili sauce, oyster sauce, oregano, and lemon zest. Stir to combine.
Add black pepper and salt to your taste. Garnish with chopped parsley
Tomato Shrimp Spaghetti Pasta is ready to serve.