Preheat oven to 180ºC and line tray with baking paper. Add broccoli, onion and zucchini and roast for 30 minutes.
Add cauliflower to blender or food processor and pulse up until it is a fine grain (should look similar to rice).
Heat a drizzle of olive oil in a fry pan and add black beans. Saute for 4-5 minutes. Set aside.
Heat a drizzle of sesame oil in a fry pan and add garlic, cooking for 2 minutes. Add cauliflower and soy sauce and cook for a 3-4 minutes. Remove and set aside.
To make the bowls divide cauliflower rice, black beans and tuna between bowls. Top with tomato, avocado and roasted veggies. Sprinkle with parmesan cheese and serve with a wedge of lime and some crackers.
In a large bowl, combine sweet potato, potato, red onion, brussel sprouts, carrots, zucchini, capsicum and 2 tbsp olive oil. Season with salt and pepper and use your hands to mix and ensure veggies are coated in oil.
Notes
We used the Sirena tuna in Italian Oil in this recipe however it would work well with any of the varieties from their range. You can check them out here.