Start by removing the seeds from the red sweet peppers, then thinly slice them lengthwise. Next, thinly slice the shallot. Roughly chop the cilantro. Slice the beef as thinly as possible for tenderness.
In a small bowl, combine the fish sauce, sugar, and lime juice to make the mixing sauce. Taste and adjust if needed, then stir in the freshly minced garlic and Thai chilis.
Blanch the sliced beef in boiling water for just a few seconds until it changes colour, then quickly remove and drain well. Put the cooked beef in a bowl.
In a large mixing bowl with the microgreens, add the sliced sweet peppers, shallot, and chopped cilantro. Pour in about two-thirds of the mixing sauce and gently toss everything together, being careful not to crush the microgreens.
Add the rest of the mixing sauce to the bowl of beef. Mix well and let it rest for a few minutes to absorb the flavours.
Add the beef to the bowl of vegetables, along with the crushed peanuts and fried shallots. Gently toss again to combine all the ingredients.
Transfer the salad to a serving bowl. Garnish with more peanuts and fried shallots if you like. Enjoy your fresh and flavourful Beef and Microgreen Salad!