Trim the sprouts and place in a saucepan of boiling salted water. Reduce to a simmer and cook for 5-8 mins, depending on the size of the sprouts. While they are cooking, heat the oil in a pan and sauté the shallots, garlic and chilli for a couple of mins over a medium heat. They should be soft and not coloured.
When the sprouts are cooked, drain them well, then stir through the shallots, garlic and chilli mixture along with a squeeze of lemon juice, salt and black pepper to taste.