Dice the carrot, celery, garlic then slice the asparagus and leek.
In a little oil, gently sauté the vegetables for 5 minutes (under cover).
Add the stock and simmer for about 5 minutes. When the vegetables are tender and most of the stock is absorbed, turn off the heat and set aside, (keep it warm under a lid).
Meanwhile, cook the pasta according to the instructions on the packaging.
Mix the pasta with the sautéed vegetables, cottage cheese and grated lemon zest.
Chop the mint leaves and add to the pasta.
Season with salt and pepper.
Serve warm or lukewarm.