That sounds like a wholesome, hearty, and flavorful vegetarian casserole! Layering potatoes with zucchini, carrots, and onions creates a beautiful blend of textures and colors, all baked until tender in a creamy sauce.
This recipe uses a simple creamy base and cheese to bind the vegetables together into a satisfying dish.
🥔🥕 Zucchini, Carrot, and Potato Casserole
This is a baked dish, similar to a gratin or a vegetable bake.
📋 Ingredients
I. Vegetables
| Ingredient | Quantity | Notes |
| Potatoes | $3 \text{ large}$ | Peeled and sliced thinly (about $1/8 \text{ inch}$). |
| Zucchini (Courgette) | $2 \text{ medium}$ | Sliced thinly (no need to peel). |
| Carrots | $3 \text{ medium}$ | Peeled and sliced thinly (or shredded). |
| Yellow Onion | 1 medium | Sliced thinly. |
| Garlic | 2 cloves | Minced. |
II. Creamy Sauce & Cheese
| Ingredient | Quantity | Notes |
| Heavy Cream | $1 \text{ cup}$ | |
| Vegetable Broth or Milk | $1/2 \text{ cup}$ | |
| Gruyère or Sharp Cheddar Cheese | $1 \text{ cup}$ | Grated, divided. |
| Fresh Thyme | $1 \text{ teaspoon}$ | Chopped, or $1/2 \text{ tsp}$ dried. |
| Salt and Black Pepper | To taste | |
| Nutmeg | Pinch | Freshly grated (enhances the creamy sauce). |
🛠️ Instructions
I. Prepare the Vegetables and Sauce
- Preheat & Prep: Preheat your oven to $375^\circ\text{F}$ ($190^\circ\text{C}$). Lightly grease a $9 \times 9 \text{ inch}$ square baking dish or a $2 \text{ quart}$ casserole dish.
- Parboil Potatoes (Optional but Recommended): To ensure the potatoes are fully tender, simmer the slices in salted water for $5 \text{ minutes}$. Drain well. Skipping this step may require longer baking time.
- Sauté Onion (Optional): For deeper flavor, briefly sauté the onion and minced garlic in a tablespoon of oil until soft ($3 \text{ minutes}$).
- Make Sauce: In a large bowl, whisk together the heavy cream, vegetable broth (or milk), $3/4 \text{ cup}$ of the grated cheese, thyme, salt, pepper, and nutmeg. Add the sautéed onion and garlic (if using).
II. Assemble the Casserole
- Toss: Add the sliced potatoes, zucchini, and carrots to the large bowl with the cream mixture. Gently toss the vegetables until they are all evenly coated with the sauce.
- Layer: Arrange the vegetables in the prepared baking dish. You can either dump the mixture in or arrange them in neat, slightly overlapping layers for a prettier presentation (like a gratin). Pour any remaining sauce over the top.
- Top: Sprinkle the remaining $1/4 \text{ cup}$ of grated cheese over the entire surface.
III. Bake
- Cover: Cover the baking dish tightly with aluminum foil.
- Bake (Covered): Bake for $35 \text{ minutes}$.
- Uncover: Remove the foil and continue to bake for another $15 \text{ to } 20 \text{ minutes}$, or until the potatoes are completely tender when pierced with a fork, and the cheese topping is golden brown and bubbly.
- Rest: Let the casserole rest for $10 \text{ minutes}$ before serving. This allows the sauce to settle and thicken.
This makes a hearty and satisfying side dish for any roast or main course!