There are versions that make it fancier, like Ethan Chlebowski recipe. He had both raw and roast garlic with butter as an emulsifier.
I now just like it simple like in The Silver Spoon

PER PERSON
Ingredients
- 90g spaghetti for one person
- 1 sliced garlic clove per person (slice against the germ)
- 1.5 tbsp olive oil
- 1/2 tsp chilli flakes
- flat leaf parsley