| Prep Time | 15 minutes |
| Cook Time | 30 minutes |
| Total Time | 45 minutes |
| Servings | 6 |
Ingredients
You will need high-quality ingredients for the best results.
For the Layers:
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1.5 lbs (700g) Boneless Skinless Chicken Breasts, cut into approximately 12 uniform medallions (roughly 1.5 inches wide).
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1.5 lbs (700g) Cremini (Baby Bella) Mushrooms, cleaned, stems removed, and sliced perfectly into halves.
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10 oz (300g) Fresh Spinach Leaves, thoroughly washed.
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4 Cloves Garlic, minced.
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2 Tablespoons Olive Oil.
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1 Teaspoon Salt (or to taste).
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1/2 Teaspoon Black Pepper.
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1/2 Teaspoon Smoked Paprika.
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1/2 Teaspoon Dried Thyme.
For the Cheesy Cream Base & Topping:
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8 oz (225g) Mozzarella Cheese, shredded (freshly grated melts best).
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4 oz (115g) Provolone Cheese, shredded (for flavor and ‘stretch’).
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1/4 Cup (60ml) Heavy Cream (for the bottom).
For the Red Glaze Finish:
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1/4 Cup (60ml) Red Pepper Jelly (this provides that exact look in the photo), OR sweet chili sauce, OR a mix of honey and sriracha.
Step-by-Step Instructions with Intensitites
This recipe is structured for efficiency. The intensity column indicates the required focus and activity level.
| Step | Intensity | Detailed Instruction |
| 1. Prep and Preheat | Low | Preheat your oven to 375°F (190°C). Prepare your 9×13 glass baking dish. Cut the chicken into medallions, slice the mushrooms into halves, and prepare the garlic and spinach. Pat the chicken medallions very dry with paper towels—this is crucial for a great sear. |
| 2. Season the Chicken | Low | In a bowl, toss the dry chicken medallions with the salt, black pepper, smoked paprika, dried thyme, and 1 tablespoon of olive oil until evenly coated. |
| 3. Sear the Chicken (Intensity: Medium) | Medium | Heat a large skillet over medium-high heat. Working in batches to avoid overcrowding, add the chicken medallions in a single layer. Cook for 2-3 minutes per side until a golden-brown crust forms (refer to the photo). The goal is color, not cooking the chicken completely through (it will finish in the oven). Remove the chicken to a plate and set aside. |
| 4. Wilt the Spinach (Intensity: Low) | Low | Reduce the heat in the same skillet to medium. Add the remaining 1 tablespoon of olive oil. Add the minced garlic and sauté for 30 seconds until fragrant. Add the fresh spinach all at once. Sauté for 1-2 minutes, stirring constantly, until just wilted. Remove from heat immediately. Use tongs to transfer the spinach to your baking dish, leaving behind most of the liquid. |
| 5. Sauté the Mushrooms (Intensity: Medium) | Medium | Increase the skillet heat back to medium-high. Add the mushroom halves. Sauté for 4-5 minutes, stirring occasionally. At first, they will absorb oil, then release liquid, and finally, they will begin to develop a rich, golden-brown glaze. Once browned, remove them from the heat. |
| 6. Layer the Gratin (The Art) | Medium | It’s time to build! In your prepared glass dish with the spinach base, pour the 1/4 cup of heavy cream evenly over the spinach. Tuck the seared chicken medallions into the spinach bed in a neat grid pattern (see photo for placement). Distribute the sautéed mushroom halves evenly on top, making sure some land on the chicken. |
| 7. Top with Cheese (Intensity: Low) | Low | Sprinkle the mixed shredded mozzarella and provolone cheeses in a heavy, even layer over the entire dish, covering the chicken and spinach completely. Make sure the mushroom halves are sitting on top of the cheese for visibility. |
| 8. Bake (Intensity: Low) | Low | Place the baking dish in the preheated oven. Bake for 15 minutes until the chicken is cooked through (reaches an internal temperature of 165°F/74°C) and the cheese is melted and bubbling. For the exact look in the photo, you want a few small golden-brown caramelized spots on the cheese. |
| 9. Glaze Finish (The Signature Step) | Low | While the gratin bakes, gently heat the red pepper jelly (or chosen glaze) in the microwave or on the stovetop until it’s a smooth, runny consistency. Immediately upon removing the dish from the oven, use a small spoon or pastry brush to place small dots of the red glaze directly onto the mushrooms and exposed chicken (again, replicating the look in our image). |
| 10. Rest and Serve | Low | Let the dish rest for 5-10 minutes before serving. This brief rest allows the cheesy cream sauce to thicken slightly. A wide spatula is essential for scooping up a perfect medallion with its layered toppings. |
Pro-Tips for Success and Customization
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Fresh-Grated Cheese: Always buy blocks of cheese and grate them yourself. Pre-shredded cheese is coated with potato starch to prevent clumping, which prevents it from melting smoothly and browning beautifully.
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Dry Your Chicken: Water is the enemy of the Maillard reaction. Use paper towels to dry the chicken medallions aggressively before seasoning.
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Mushroom Variations: While cremini mushrooms provide a great meaty flavor and hold their shape, you can easily sub in white button mushrooms or use large, quartered portobello caps.
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Spinach Alternatives: If you find fresh spinach is too bulky, you can use frozen spinach. You must thaw it and squeeze every single drop of water out with a towel or sieve before using. If you omit this, your entire dish will be watery.
Serving Suggestions
This rich gratin pairs best with sides that are clean or can soak up the delicious cheesy sauce:
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Clean and Crisp: A simple arugula salad with a lemon vinaigrette or steamed green beans almondine perfectly counteracts the richness of the cheese.
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Carb-Soppers: For those who are not following a low-carb diet, serve this over a bed of fluffy jasmine rice, lemon-herb quinoa, or even just alongside crusty artisan bread.
Nutrition Information (Estimate per Serving)
This information is an estimate based on the ingredients listed above and a final yield of 6 servings.
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Calories: ~385
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Total Fat: ~26g
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Saturated Fat: ~11g
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Cholesterol: ~110mg
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Sodium: ~690mg
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Total Carbohydrates: ~8g
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Dietary Fiber: ~2g
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Sugars: ~3g
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Protein: ~31g
