Preheat the oven to 200 degrees Celsius.
Place the cut beetroots in an oven safe baking pan or baking sheet and drizzle with a little olive oil. Place in the oven and bake for 15 minutes.
After 15 minutes add the sweet potatoes and drizzle a little more olive oil and bake for another 10-15 minutes, until the vegetables are soft, tender and golden brown.
Meanwhile preheat a nonstick pan over medium heat with a little bit of water (1/2-1 tablespoon) and let the mushrooms fry until the water has evaporated. Add the tamari or soya sauce and fry for 1-2 minutes. Set the mushrooms aside.
Place the pan back on the stove and increase the temperature to medium/high heat. When the pan is hot add the diced halloumi and fry for a few minutes until golden brown. Stir occasionally.
Divide the salad between two bowls. Divide beetroots, sweet potatoes, mushrooms and halloumi between the bowls. Top with bean sprouts and sliced scallion and serve while warm.