Spaghetti with Spinach

Name: Spaghetti with Spinach
Ingredients: 1 bag frozen spinach; 1/2 yellow onion, diced; 2 cloves garlic, minced; handful fresh thyme; 3 tablespoons olive oil; a drizzle of white wine; 1/2 lb spaghetti, cooked according to instructions; 4oz feta; kosher salt, to taste; fresh cracked black pepper, to taste