Heat the olive oil in a skillet over medium flame. Add minced garlic and sauté until fragrant, about 30 seconds. Don’t let it burn—you’re not roasting forest fire, promise.
Whisk in flour to form a light roux. Cook for 1 minute to remove raw flour taste, then slowly pour in the dairy-free milk, whisking constantly.
Simmer until the sauce thickens to a creamy consistency, about 3–5 minutes. If it’s too thick, splash in a splash more milk; if too thin, give it another minute of simmering.
Stir in dairy-free parmesan, onion powder, pepper, salt, and a tiny pinch of nutmeg. Taste and adjust seasonings like a boss.
Pour the sauce over hot, drained pasta and toss until every noodle is coated. If you need a little extra gloss, whisk in a splash of pasta water.