"Create a flavorful pasta recipe using zucchini with thick skin, leeks, parsley, heavy cream, fresh salmon steaks (bone-in, skin-on, oval cut), garlic, spring onions, herb and spice grinder mix, ghee, lemon, tagliatelle pasta, cream cheese, standard onions, and chicken/veg broth cubes. The user dislikes capers. Focus on best flavor balance and advise whether to use vegetable broth cubes, homemade salmon pan stock from browned bits after cooking salmon, or both. Include what to use, what to add or remove, and clear step-by-step instructions. Use imperial units."