Sweet Potato, Zucchini and Mozzarella Chicken Gratin

Sweet Potato, Zucchini and Mozzarella Chicken Gratin is a medium French recipe that serves 4. 725 calories per serving. Recipe by Chef Michel Dumas on YouTube.

Prep: 15 min | Cook: 1 hr 4 min | Total: 1 hr 34 min

Cost: $10.12 total, $2.53 per serving

Ingredients

  • 800 g Sweet potatoes (peeled and cut into 2 cm cubes)
  • 300 g Zucchini (cut into dice)
  • 200 g Yellow onions (sliced into strips)
  • 2 cloves Garlic cloves (finely chopped)
  • 10 leaves Fresh basil (chopped)
  • 500 g Boneless, skinless chicken breasts (cut into 2 cm dice)
  • 200 g Shredded mozzarella (shredded)
  • 15 g Gluten‑free flour (for thickening)
  • 200 ml Liquid cream (30 % fat) (at room temperature)
  • 30 ml Olive oil (for cooking)
  • 1 tsp Salt (plus 25 g for cooking water)
  • 0.5 tsp Ground black pepper (to taste)
  • 15 ml Soy sauce (optional) (to season the sauce)

Instructions

  1. Prepare the sweet potatoes

    Peel the sweet potatoes then cut them into approximately 2 cm cubes.

    Time: PT5M

  2. Cut the vegetables and basil

    Wash the zucchini, cut into dice. Slice the onions into strips, chop the garlic and chop the basil.

    Time: PT5M

  3. Prepare the chicken and cheese

    Cut the chicken breast into 2 cm dice. Grate the mozzarella using a grater.

    Time: PT5M

  4. Cook the sweet potatoes

    Place the sweet potato cubes in a saucepan, cover with cold water, add 25 g salt and bring to a boil. Reduce heat and simmer 20 minutes until tender.

    Time: PT20M

    Temperature: eau bouillante

  5. Drain and keep warm

    Drain the sweet potatoes in a colander, keep them warm in the saucepan off the heat.

    Time: PT2M

  6. Sauté the chicken with onions and garlic

    Heat 1 tbsp olive oil in a pan over medium‑high heat. Add the chicken, onions and garlic, season with salt and pepper. Cook 15 minutes, stirring, until the chicken is cooked through and lightly browned.

    Time: PT15M

    Temperature: feu moyen‑élevé

  7. Sauté the zucchini

    Push the chicken to the side, add the zucchini dice to the pan, season with salt and pepper and brown for 7 minutes, stirring regularly.

    Time: PT7M

    Temperature: feu moyen

  8. Prepare the creamy sauce

    In a small bowl, mix the gluten‑free flour with 1 tbsp olive oil. Pour this mixture into the pan, cook 1 minute while stirring. Add the liquid cream and soy sauce, bring to a gentle boil and let thicken for 5 minutes. Adjust seasoning.

    Time: PT5M

    Temperature: feu moyen

  9. Assemble the gratin

    In a gratin dish, layer the sweet potatoes, chicken, zucchini and pour the creamy sauce over. Lightly mix to combine.

    Time: PT5M

  10. Add cheese and basil

    Sprinkle the top of the gratin with shredded mozzarella and chopped basil.

    Time: PT2M

  11. Gratin under the broiler

    Preheat the oven on broil setting. Bake the dish for 8 minutes until the cheese is melted and lightly browned.

    Time: PT8M

    Temperature: grill du four

  12. Rest before serving

    Remove the gratin from the oven and let rest for 5 minutes before serving.

    Time: PT5M

Nutrition Facts

Calories
725
Protein
38 g
Carbohydrates
46 g
Fat
40 g
Fiber
4 g

Dietary info: gluten‑free (certified flour), high in protein, contains dairy products, high-protein

Allergens: milk, gluten, soy

Last updated: April 7, 2026

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Sweet Potato, Zucchini and Mozzarella Chicken Gratin

Recipe by Chef Michel Dumas

A comforting gratin combining tender chicken, sweet potatoes, fresh zucchini and melty mozzarella, highlighted by a creamy basil sauce. Perfect for a convivial summer dinner.

MediumFrenchServes 4

Shop all ingredients on Amazon in one click • Printable PDF with shopping checklist

Source Video
36m
Prep
48m
Cook
10m
Cleanup
1h 34m
Total

Cost Breakdown

$10.12
Total cost
$2.53
Per serving

Critical Success Points

  • Cook the sweet potatoes until tender
  • Cook the chicken until fully done
  • Thicken the sauce without lumps
  • Broil the cheese until golden

Safety Warnings

  • Handle raw chicken with separate utensils to avoid cross‑contamination.
  • Be careful with hot oil and boiling water to prevent burns.
  • Use gloves or a mitt when placing under the oven broiler.

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