For the sauce

• 1 tablespoon of olive oil
• 1/2 large onion, finely diced
• 1 large carrot, diced into small cubes
• 2 celery sticks, diced into small cubes
• A handful of spinach, chard or another leafy green vegetable, diced
• 6 mushrooms, diced into cubes
• 1 + 1/2 teaspoons salt
• 3 garlic cloves, minced or diced
• About 1 lb / 500 g ground beef mince
• 1 can of chopped tinned tomatoes (400 g)
• 2 tablespoons tomato paste
• 1 tablespoon coconut aminos (or Tamari gluten-free soy sauce)
• 1 tablespoon balsamic vinegar
• 2 tablespoons coconut sugar (brown sugar can also be used)
• 1 onion stock cube (or 1 tablespoon onion soup powder)
• 1/2 teaspoon of black pepper
• Pinch of chilli flakes
• ¼ cup water

For sweet potatoes

• 2 medium sweet potatoes, cut in halves lengthways
• 2 tablespoons olive oil
• Salt for seasoning