Pre-heat the oven at 400 F.
Clean the brussel sprouts and cut them into halves. Take olive oil, salt, pepper in a bowl and toss the brussel sprouts in them. Make sure all of them are coated with oil.
Spread the Brussel sprouts in a baking tray. Once the oven is preheated, place the tray and roast them for 20-25 minutes, tossing halfway into roasting.
Halfway into the oven, I usually take out the tray and remove the ones I feel have roasted well specially the ones with single layer. Because they will burn if you leave them longer in there.
While they are in the oven, make a dressing. In a bowl, take balsamic vinegar, sriracha, honey, oregano, pinch of salt and black pepper. Remember we have already salted the sprouts when we put them in the oven. So, be careful with extra salt.
Once the Brussel Sprouts are done cooking in the oven, remove them and toss them in the dressing bowl.
Mix it well.
Assembly - lightly grill your tortillas on the skillet or open flame for few seconds.Remove them, put a spoonful of brussel sprouts, followed by salsa, pickled onions, and other toppings finally with cotija cheese. You can use any other cheese you like, shredded blend of Mexican cheese. But we are huge fans of cotija cheese. If you haven’t tried it, then you should. It keeps well for months.
You can use double tortillas too instead of single. I have shared serving for 4 people approximately 3 tacos per person. But if you double up you will of course need more tortillas. You can also use hard shell tacos.