1. Crank your oven to 375°F (190°C) and let it preheat. Grab a 9×13-inch casserole dish and give it a good spray with cooking oil.
2. Heat the olive oil in a large skillet over medium heat. Add the diced onion and minced garlic, stirring occasionally until they’re soft and fragrant, about 4-5 minutes. Don’t let the garlic brown or it’ll turn bitter.
3. Toss in the sliced mushrooms and those very finely chopped sage stems. Cook, stirring occasionally, until the mushrooms release their liquid and it mostly evaporates, about 6-7 minutes. The mushrooms should be tender and golden.
4. Sprinkle the flour over everything and stir it around for about a minute. This creates your roux that’ll thicken the sauce beautifully.
5. Slowly pour in the chicken broth while stirring constantly to avoid lumps. I like to add it in three batches, stirring well between each addition. Take your time with this step—smooth sauce is worth the patience.
6. Pour in the heavy cream and keep stirring until the mixture thickens up nicely, about 3-4 minutes. It should coat the back of a spoon.
7. Add the shredded turkey and season generously with salt and pepper. Give it a taste and adjust the seasoning—this is your last chance before baking.
8. In your prepared casserole dish, layer half of the cooked egg noodles on the bottom. Pour half of the turkey and mushroom mixture over them, spreading it evenly with a spatula.
9. Repeat with the remaining noodles and turkey mixture, creating nice even layers. Pile that shredded mozzarella cheese on top, making sure to cover the whole surface.
10. Cover the dish with foil and slide it into the oven. Bake for 20 minutes covered.
11. Remove the foil and bake for an additional 10 minutes until the cheese is golden, bubbly, and practically calling your name. Keep an eye on it during these last 10 minutes.
12. Let it cool for about 5 minutes before serving (if you can wait that long). This helps everything set up and makes serving cleaner.

Nutrition Information (Per Serving):

• Calories: 385
• Carbohydrates: 28g
• Protein: 25g
• Fat: 19g
• Fiber: 2g
• Sodium: 480mg
• Calcium: 165mg (13% DV)
• Iron: 2.3mg (13% DV)
• Vitamin A: 520 IU (10% DV)

This casserole provides excellent protein from the turkey and calcium from the cheese, making it a satisfying, well-balanced comfort food meal.

Notes:

• Seriously, chop those sage stems as fine as possible—they’re tougher than leaves and need to be minced almost to a paste.
• Make sure your noodles are cooked al dente. They’ll cook more in the oven and you don’t want them mushy.
• Don’t rush cooking the mushrooms—let them release their liquid and brown slightly for maximum flavor.
• Every oven runs differently, so check the cheese at 8 minutes after removing the foil—you want golden and bubbly, not burnt.
• This tastes even better the next day after the flavors have melded together.

Storage Tips:

• Store in an airtight container in the fridge for up to 4 days.
• Freezes beautifully (unbaked) for up to 3 months—wrap tightly in plastic and foil.
• Reheat in the oven at 350°F for about 20 minutes, covered with foil to prevent drying out.
• Don’t microwave if you can help it—the noodles get weird and the cheese turns rubbery.

Serving Suggestions:

• Simple green salad: The fresh, crisp greens with a light vinaigrette balance out the rich, creamy casserole perfectly
• Roasted Brussels sprouts: Their slight bitterness complements the creamy sage flavors beautifully
• Cranberry sauce: A dollop on the side adds tart sweetness that cuts through the richness
• Garlic bread: For soaking up any extra creamy sauce from the bottom of the dish

Mix It Up (Recipe Variations):

• Italian-Style Sage Casserole: Add 1/2 cup chopped sun-dried tomatoes with the turkey and use half Parmesan, half mozzarella for an Italian twist that tastes restaurant-quality.
• Garlic Herb Turkey Bake: Add fresh thyme stems along with the sage and double the garlic for an aromatic version that smells absolutely incredible.
• Spinach and Sage Turkey Bake: Layer 2 cups sautéed spinach between the noodle layers for extra nutrients and a pop of color.
• Low-Carb Sage Turkey Bake: Swap egg noodles for spiralized zucchini noodles to cut the carbs while keeping all that delicious flavor—perfect for anyone watching their carb intake.

What Makes This Recipe Special:

This turkey and sage stem casserole celebrates the zero-waste cooking philosophy by using herb stems that typically get discarded. Sage stems contain the same essential oils as the leaves but in a more concentrated form, providing deep herby flavor without the slight bitterness that can come from too many leaves. The technique of making a proper roux before adding liquids creates a silky, lump-free sauce that coats every noodle perfectly. By using these overlooked parts of ingredients, you’re reducing food waste while creating comfort food that tastes indulgent and sophisticated. It’s resourceful cooking at its finest.