Add the cauliflower florets to a pan of boiling water. Simmer for 5-6 minutes until just tender. Drain completely and set aside to steam dry.
Step 2
Heat the oil in a skillet over a medium/high heat. Add the sausages and cook until browned all over. Remove the sausages from the skillet with a slotted spoon and set to one side.
Step 3
Thinly slice the leek and the garlic. Finely chop the rosemary. Add the garlic, leek, rosemary and cauliflower florets to the skillet used to cook the sausages. Pan fry over a medium heat for a few minutes until the cauliflower and leeks are lightly browned.
Step 4
Slice the sausages into 1 inch chunks. Return the sausage pieces to the skillet. Add the mustard. Stir well to combine and continue to cook for a few minutes, making sure the sausages are completely cooked through. Serve hot with your preferred sides or toppings.