Heat a medium saucepan over medium heat. Add olive oil and onion and sauté for 4-5 minutes until softened. Add minced garlic and cook for 1 more minute. Add tomatoes, salt, oregano, basil, sugar, and garlic salt. Continue to cook for 2-3 minutes, stirring occasionally, until everything comes together. Add water, stir, and turn to medium low heat. Cook for 15-20 minutes until onions are full cooked and the sauce becomes your preferred texture, adding additional chicken broth or water as necessary. Remove from heat and set aside.