Prepare the broccoli by finely chopping or grating it.
In a saucepan, melt the butter over medium heat.
Add the minced garlic and sauté for 1 minute.
Pour in the milk and stock, and season with onion powder, salt, and pepper to taste.
Bring the mixture to a simmer and add the dried pasta.
Cook the pasta according to package instructions until al dente.
Stir in the Greek yogurt and the cheese until the cheese is melted and the sauce is creamy.
Add the broccoli and stir to combine.
