1. Stir-fry the garlic
Heat 1 Tbsp of vegetable oil in a saucepan on medium heat.
Stir-fry the chopped garlic until golden brown.
2. Stir-fry the beef
Next, add onion and stir-fry until it turns a light gold colour.
Then add the sirloin steak.
3. Add the vegetables
Throw in the bell pepper, and the baby corn.
Stir-fry the contents of the saucepan until cooked through.
4. Add the lemongrass paste
Add 1 sachet of lemongrass paste and 6 Tbsp of water. The water will break down the paste and thicken the sauce so it can spread all over the ingredients.
5. Add the seasoning
Add the sugar and the fish sauce, and bring the saucepan to the boil. Then lower the heat and simmer for a short while to develop all the flavours and aromas.