Stir Fried Beef with Water Spinach

Ingredients

Quantity	Ingredients	Pictorial illustration
400 g	Slice Boneless Beef (Sliced against the grain into thin slice)
3 tbsp	Oil
3 tbsp	Oyster sauce
1 tbsp	Corn flour
2 clove	Garlic (peeled and ground)
2 slice	Ginger (peeled and ground)
250 g	Water Spinach (cut into short length)
1 glass	Plain water

Methods

1. Pour oil into a hot pan

2. Stir fry the garlic and ginger for 3 minutes

3. Add in half of the plain water

4. Add in all the slices beef and stir-fry until the beef turn light brown

5. Then oyster sauce and a pinch of salt are added in.

6. Let it simmer for 5 minutes

7. Then add in the water spinach for 5 minutes and mixed well.

8. Lastly add in the cornstarch and let it simmer for another 3-5 minutes

9. Served on a plate.

Chemical Changes

Corn Flour

• The chemical changes that took place is Gelatinization. Gelatinization occur when starch is heated in water, the heat energy causes hydrogen bonds in the starch granules to break.

• This facilitates the entry of water into the granule and the shifting of amylose molecules into the water surrounding the granules.

• Water continues to migrate into the granules, causing swelling when the starch mixture is heated to the temperature range required for gelatinization.

• As water is not compressible in the starch granule, the volume of the granule increases as more and more water enters and forms hydrogen bonds with the amylopectin and amylose molecules.

• This bound water not only affects the viscosity of the starch mixture by increasing the physical size of the starch granule,but also reduces the amount of free water external to the granules

• No. of serving(s)	:	2
  Recipe Analysis

  Ingredient Energy (kcal) Protein (g) Total Fat (g) Saturated Fat (g) Cholesterol (mg) Carbohydrate (g) Dietary Fibre (g) Sodium (mg) Beef, boneless, unspec cut, raw, lean only 180 32 6 2.7 90 0 0.0 87 Oil, canola 135 0 15 1.1 0 0 0.0 0 Sauce, soya, light 13 2 0 0.0 0 2 0.0 1,241 Garlic, raw 20 1 0 0.0 0 4 0.1 1 Ginger, raw, peeled 30 1 1 0.2 0 5 1.0 2 Water convulvolus, raw 73 8 1 N.A 0 9 3.5 163 Total (per serving) 250 23 11 2.0 45 16 3.0 769