Beef, red pepper and mushroom goulash

Ingredients

• 1 tablespoon olive oil
• 1 small onion, finely chopped
• 1 garlic clove, crushed
• 2 teaspoons sweet paprika
• 100g lean beef, cut into small cubes
• 1 reduced-salt vegetable stock cube, dissolved in 350ml water
• ½ red pepper, sliced
• 1 parsnip, peeled and cut into batons
• 1 carrot, peeled and cut into batons
• 12 button mushrooms
• 50g split red lentils, rinsed
• Freshly ground black pepper
• 80g wholegrain rice