Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain and reserve. Meanwhile, in a medium saucepan over medium heat bring water to a boil. Add spinach and cook for 5 minutes or until spinach is tender; drain and reserve.
In a large pot over medium heat, warm olive oil and saute garlic until golden; add pasta and spinach and mix.
Remove from heat and let cool for ten minutes. Add feta and dill; mix well and serve.