Bring lots of water in a large enough pot to boil & add the tagliatelle. Let the pasta cook as long as the instruction recommends (& you like the pasta) - it's about 10 min.
In the meantime: Clean & trim & chop the spring onions & let them fry in olive oil for some minutes - softly.
Chop the fresh salmon & add to the spring onions.
Fry the mess for about 5 min. Then add the cream & finish w/ salt & pepper.
When ready, drain the pasta & add the pasta to the salmon mess & mix.
Distribute the pasta to 2 bowls.
Go on working w/ the same pan: Press the cloves of garlic & let it fry in olive oil for 1-2 min.
Add the spinach leaves & let them wilt.
Add salt & pepper.
Distribute the spinach mess on top of the pasta & serve.