In a large pot of boiling, lightly salted water, cook pasta until al dente (about 8-12 minutes).
Reserve at least 2 cups pasta water.
Drain and remove pasta from pot.
To the pot, add ½ cup pasta water, Feta cheese, dill (start with 2 tablespoons dill and add more as you desire) and garlic. Cook and stir on medium heat just until melted and smooth, about 3-4 minutes.
Add cooked pasta and toss to coat, adding additional pasta water as required until the sauce coats all the pasta. You may find you have to keep adding pasta water as it sits, so don't dump it!
Taste and add salt and pepper as needed, or additional fresh dill if desired.