STEP 1/10
Wash the onions and cut them into ring shapes and 0.2mm thick.
STEP 2/10
Make a sweet vinegar solution in water: vinegar:sugar (100g:100g:50g) ratio and marinate 1 onion.
STEP 3/10
Wash the green and red peppers and chop them finely.
STEP 4/10
Chop the beef into 0.5cm*0.5cm sizes and mix it with soy sauce, sesame oil, and sugar (3g).
STEP 5/10
Put a little cooking oil in a frying pan and stir-fry 4 beef on high heat for 2 minutes and cool.
STEP 6/10
Cut the pineapple into 3cm*3cm thick and 0.5cm thick, and cook and cool it in a frying pan over medium heat without cooking oil.
STEP 7/10
Wash the lettuce, cut it into 2cm long, and soak it in cold water.
STEP 8/10
Put fish sauce, Vietnamese spring roll sauce, chili sauce, lemon juice, minced garlic, sugar (10g), 3 and 5 in a mixing bowl and make sauce.
STEP 9/10
When the water boils in the pot, boil the noodles for 4 minutes and 30 seconds, rinse them in cold water, and drain them.
STEP 10/10
Put the noodles in a bowl, place the unsealed lettuce, pineapple, and onion pickles, pour the sauce, and sprinkle the powder.
Adjust the sour and spicy flavors according to your preference.