Bring a large pot of water to a boil. Add 1 teaspoon of kosher salt and add the trimmed sprouts. Boil for 8-10 minutes until the sprouts are fork-tender.
Drain the sprouts and run them under cold water to cool them. Using a dish towel pat the sprouts nice dry them and turn them out onto a large baking sheet.
In a small bowl combine the olive oil, lemon juice, garlic powder, salt, and pepper. Drizzle the mixture over the sprouts and coat well with your hands.
Use a heavy bottom jar or wine bottle and carefully press each sprout down until they are nice and flat. Remember, the flatter they are the crispier they will be.
Bake the sprouts for 10 minutes, flip and top with the parmesan. Bake an additional 5-10 minutes until the sprouts are crispy and the cheese has melted.
While the sprouts are baking you can make the sauce. Mix the mayonnaise, lemon juice, zest, garlic, herbs, salt, and pepper until well combined. Taste-test the sauce and additional lemon or herbs based on your preference.
Notes
The cooking time will vary based on how much you smash your sprouts. Watch them carefully and remove them from the oven when crispy. This recipe makes 6 servings (about 1 heaping cup each + close to 2 tablespoons of aioli), and each serving has 7.8 net carbs.
Serving: 1 heaping cup of brussels + about 2 tablespoons aioli, Calories: 205kcal, Carbohydrates: 13g, Protein: 6g, Fat: 16.1g, Cholesterol: 8.8mg, Sodium: 348.4mg, Fiber: 5.2g, Sugar: 3.1g