Caramelize the onions and garlic: Add grapeseed oil to a pan, then add the onions, salami, sage leaves, and garlic. Cook until the onions are caramelized, which should take five to eight minutes. Add a teaspoon of gochugaru. Mix and add the tomato pasta. Then add the heavy cream and oyster sauce. Let the sauce simmer for five minutes.
Prepare the pasta: Cook the Pasta until Al dente, following the instructions on the back of the package. Past pasta typically takes 8 to 9 minutes to cook in boiling water.
Garnish: Garnish with Grana Padano cheese and a sprinkle of gochugaru.