Boil 1 pound of trimmed brussels sprouts in a pot of heavily salted water until tender, about 5 minutes.
In a small bowl, mix together 1 ½ teaspoons onion powder, ½ teaspoon garlic powder, ½ teaspoon Aleppo pepper, 1 ½ tablespoons nutritional yeast, ½ teaspoon of sea salt and freshly cracked black pepper to taste.
Smash each brussels sprout to a quarter inch thick with the backside of a heavy pan or mallet.
Fry the sprouts in ¼ cup olive oil on medium heat until golden brown on both sides, about 3 minutes per side.
Place on a paper towel lined baking sheet, season with freshly squeezed lemon juice and the spice mix.
Check for seasoning and serve hot, with ½ cup of freshly prepared garlic aioli if desired.