Bring a large pot of water to boil. Add a good pinch of salt
Cook the pasta in the salted water, following instructions on the packet, or just a couple of minutes if using fresh pasta
In a saucepan add the vegetable stock, lemon juice and sliced garlic and bring to the boil until half the liquid has evaporated
Add the tomatoes, parsley and avocado
Add the linguine and smoked trout and toss together with a pinch of salt and pepper until all the ingredients have combined well and excess liquid has evaporated