01 -
In a large heavy pot, warm up olive oil with butter over medium until melted and foamy stops forming.
02 -
Throw in onion slices, season with salt and pepper, then cook, stirring now and then, until they turn a rich golden brown. This takes 30-35 minutes.
03 -
Watch over your onions carefully. If they start to burn, tweak the stove heat or add a bit more fat.
04 -
Stir in the minced garlic, sauces, and pepper flakes. Let them cook just a moment for the flavors to come out.
05 -
Turn the heat up to high and pour in the water along with half the evaporated milk.
06 -
Mix the rest of your evaporated milk with the cornstarch until smooth, then add it to the pot.
07 -
Toss in your seasonings, bouillon, and herbs while waiting for the mixture to boil.
08 -
Add the dry pasta, then lower to a bubbling simmer just above medium heat for about 20-25 minutes.
09 -
Stir the pasta regularly during cooking to make sure it’s staying under the liquid.
10 -
Check the pasta regularly and top off with extra water if it’s needed until pasta is firm but cooked.
11 -
Take the pot off the heat once the pasta is perfect and the sauce is still saucy.
12 -
Stir in small amounts of Gruyere at a time until it’s melted into the sauce.
13 -
Add Parmesan to the dish, stirring until everything turns creamy and smooth.
14 -
Taste a bite and make tweaks to the seasoning if it’s necessary.
15 -
Add some more liquid if you prefer your sauce to be looser.