French Onion Stuffed Chicken Casserole
Each serving of this French Onion Stuffed Chicken Casserole provides 25g protein and 411 calories — a lighter option for cutting phases or higher-rep training days. Makes 4 servings via stovetop cooking in minimal time, fitting into quick meal prep windows. Lets you hit protein targets without excess calories when you're in a deficit.
Ingredients
- •Unsalted Butter(30g)
- •Yellow Onion
- •1 pinch salt (to season)
- •1 pinch pepper (to season)
- •Thyme, Fresh(10g)
- •Wine, White, Dry(30g)
- •Garlic(120g)
- •Low Sodium Beef Broth(120g)
- •Olive oil(15g)
Regular (not extra-virgin) olive oil for high-heat cooking. EVOO for dressings.
- •Chicken Breast, Boneless Skinless
Boneless skinless. Buy in bulk and freeze — Costco rotisserie packs work too.
- •Garlic powder(10g)
- •Thyme, Dried(5g)
- •Cheese, Gruyere(240g)
Part-skim mozzarella. Pre-shredded bags are convenient for meal prep.
- •Parmesan Cheese(60g)
Grated Parmesan — the shelf-stable canister is fine for cooking.
Instructions
- 1Preheat oven to 400°F (200°C). Lightly grease a 9x12-inch baking dish. Set aside.
- 2Melt butter in a large skillet over medium-high heat. Add onions and season with salt, pepper and half of the fresh chopped thyme. Cook for 5-8 minutes until soft.
- 3Reduce heat to medium and cook, while stirring occasionally, until onions are caramelized and jammy (about 15 minutes). Pour in 1/4 cup of broth if pan gets too dry, and keep stirring until onions are browned.
- 4OPTIONAL: Pour in white wine, sherry or balsamic vinegar to deglaze the pan and get some additional flavours into the onions. Let cook for a minute until the sauce thickens slightly.
- 5Stir in garlic and cook until fragrant, about 1 minute. Turn off heat and let cool slightly.
- 6Cut chicken breasts in half horizontally to create pockets. Season chicken all over and inside pockets with salt, pepper, garlic powder and ground thyme.
- 7Spoon 1-2 tablespoons of caramelized onions into each pocket. Stuff each breast with the cheeses and seal chicken with toothpicks.
- 8Transfer the remaining caramelized onions from the skillet to the prepared baking dish. Mix in remaining 1/4 cup of broth. Set aside.
- 9Heat oil in the same skillet over medium high heat. Sear the stuffed chicken breasts for 4 minutes each side until browned. (They will not be fully cooked. You will finish them off in the oven.)
- 10Arrange chicken on the caramelized onions in the baking dish. Spoon some of the sauce in the dish over each chicken breast. Top with remaining chopped thyme and bake for 15-20 minutes or until fully cooked.
- 11Discard toothpicks. Serve with pan juices and onions.
Nutrition — Per Serving
411
calories
25g
protein
34g
fat
- Carbohydrates
- 16g
- Saturated fat
- 14.3g
- Sodium
- 747 mg
- Dietary fiber
- 1.7g
4 servings per batch · ~160g each
Macro data sourced from USDA FoodData Central
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How much protein does French Onion Stuffed Chicken Casserole have per serving?
Each serving provides 25g of protein alongside 411 calories, 34g fat, and 16g carbs. The lower protein density compared to whole-chicken preparations means this works better as a side or lighter dinner option.
How long does French Onion Stuffed Chicken Casserole take to prep?
This recipe has quick prep time and yields 4 servings from a single stovetop cooking session. You're batch-prepping an entire casserole at once, making it efficient for a smaller household or shorter meal prep cycle.
Is French Onion Stuffed Chicken Casserole good for fat loss?
At 411 calories per serving with only 25g protein, this casserole is relatively calorie-dense for its protein content and better suited as an occasional side dish rather than a primary fat-loss protein source. You'd need additional lean protein on the side to hit daily targets efficiently.
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