1. Place onion, garlic, bay leaf and salad oil in a microwave-safe bowl (2 1/2 liter or 2 1/2 quart) and mix.

2. Cover with a vented microwave lid and cook on HIGH (1200W) for 1 minute.

3. Take out and stir.

4. Add flour, curry powder, cinnamon, crushed red pepper and Garam Masala (optional) and stir.

5. Cover and cook on HIGH (1200W) for 1 minute.

6. Take out and stir until it reaches full flavor.

7. Add salt, soy sauce, Worcestershire sauce, tomato ketchup and stir until it becomes smooth.

8. Add 1/2 cup of boiling water at a time until all the water has been used. Stir until it becomes smooth.

9. Cover and cook on HIGH (1200W) for 2 minutes to finish. Remove bay leaf.

* Now you can make a grand curry dish simply by adding chicken, pork, beef, seafood, eggs, spinach, and many more options with <Sachi's Special Curry Sauce>.

For how long you should cook with your microwave oven, see Cooking Time vs Wattage Conversion.
For more tips of using Microwave Oven, see Sachiko's Guideline to Microwave Cooking.