Prep a large rimmed baking sheet with foil. Lightly spray foil with cooking spray so your vegetables don't stick while roasting.
Add Brussels sprouts, mushroom and red onion to a sealable bag with maple syrup, amino acids, liquid smoke, garlic clove, red pepper, salt and pepper.
Let vegetables marinade for 30 minutes.
Preheat oven to 425 degrees.
Chop sweet potato and lay out evenly on baking sheet.
Drain and rinse chickpeas. Lay evenly on baking sheet.
Sprinkle both sweet potato and chickpeas lightly with salt.
Drain the veggies that you marinated and lay out on baking sheet evenly.*you may want to save the marinade and use as a dipping sauce or for a drizzle!
Roast in oven for 40 minutes. Check at 20 minutes, stir veggies so they cook evenly and cook for another 20 - 25 minutes more or until done. Mine were done around 45 minutes, but my oven is a propane / gas oven. Your oven may cookn differently.
After roasting, squeeze lime juice over the brussels sprout mixture in the pan.
Place in bowl, top with avocado slices and enjoy!