Squeeze the spinach dry and chop it finely. Chop the spring onions, including most of the green parts.
Heat the oil in a heavy-based saucepan. Stir-fry the garlic for 30 seconds, then add the spring onions and stir-fry for 1 minute. Add the spinach and dill and cook for a further 1 minute.
Add the rice to the pan and cook for a further 1 minute, then pour in 650 ml (1 pint 2 fl oz) of water, the lemon juice, and salt and pepper to taste. Bring to the boil, then cover and simmer for 20 minutes, or until the water has been absorbed. Serve warm.