Preheat the oven to 350 degrees.
Chop the sweet potato into 1-inch cubes and lay the chunks on a large parchment paper-lined sheet pan. Sprinkle 1 tbsp avocado oil, ½ tsp garlic powder, ½ tsp onion powder, ⅛ tsp salt & ⅛ tsp black pepper over the potatoes. Toss the potatoes until the seasonings coat each piece and arrange them so they're not touching each other.
Lay the sliced mushrooms on a separate large parchment paper-lined sheet pan. Sprinkle 1 tbsp avocado oil, ½ tsp garlic powder, ½ tsp onion powder, ⅛ tsp salt, and ⅛ tsp black pepper over the mushrooms. Toss to combine and arrange them so they're not touching each other.
Put both of the sheet pans with the sweet potatoes and the mushrooms into the oven to bake for 30 minutes, flipping halfway through.
While the mushrooms and potatoes are cooking, cook the quinoa in a small pot according to the package directions. When it's done cooking, keep it covered so it stays warm until you're ready to build the bowls.
Next, thinly slice the cabbage, rinse and drain the can of black beans, and make the pistachio kale sauce. Here are the instructions to make the pistachio kale sauce. When the vegetables and quinoa are done cooking and you have the rest of the bowl ingredients prepped, it's time to build a bowl! Slice the avocado now.
Assemble each bowl with ¾ cup cooked quinoa, ½ cup roasted sweet potatoes, ½ cup roasted mushrooms, ¼ cup black beans, ½ cup red cabbage, ¼ of an avocado, and 3 tbsp pistachio kale sauce. You can eat it like this or you can mix it up so you get a little bit of everything in each bite!