Dump-and-Bake Halloumi Butternut Squash Orzo: Easy Vegetarian Dinner

Dump-and-Bake Halloumi, Butternut Squash, and Orzo Casserole

Butternut squash needs time in the oven; halloumi does not. For a casserole that gives the squash time to soften without leaving the cheese tough, bake small squash cubes with uncooked orzo, vegetables, and broth under foil. Add the halloumi near the end, then return the dish to the oven just long enough to heat and lightly brown it.

The result is a substantial meatless dinner with tender squash, orzo that absorbs the seasoned broth, and salty pieces of cheese on top. Most of the work happens in one baking dish. The only pause is when you uncover it to stir in the spinach and add the halloumi.

Recipe at a glance

• Yield: 4 servings
• Prep time: About 20 minutes
• Cook time: About 50 to 60 minutes
• Total time: About 1 hour 10 minutes to 1 hour 20 minutes
• Course: Main dish
• Equipment: A deep 9-by-13-inch baking dish, foil, and a large spoon

The cooking times are estimates. Squash size, baking-dish depth, and the brand of orzo can all affect when the casserole is ready.

Ingredients

• 1 tablespoon olive oil (15 ml), plus a little for the baking dish
• 1 small yellow onion, finely diced
• 1 red bell pepper, diced
• 2 garlic cloves, minced
• 1 pound peeled and seeded butternut squash (450 g), cut into roughly 1/2-inch (1.25-cm) cubes
• 8 ounces dry orzo (225 g)
• 1 teaspoon dried oregano
• 1/2 teaspoon dried thyme
• 1/4 teaspoon freshly ground black pepper
• 2 3/4 cups low-sodium vegetable broth (650 ml), preferably warm
• 1 cup canned crushed tomatoes (240 ml)
• 2 packed cups baby spinach (about 2 ounces or 60 g)
• 8 ounces halloumi (225 g), cut into roughly 3/4-inch (2-cm) cubes or thick slices
• 1 tablespoon lemon juice (15 ml)
• Chopped parsley, for serving, optional

Choose a vegetable broth if you want the dish to remain meatless. Halloumi is a dairy cheese, and some brands use animal-derived rennet. Check the package if a strictly vegetarian meal is important to you.

How to make the casserole

1. Heat the oven and prepare the dish. Heat the oven to 400°F (200°C). Lightly oil a deep 9-by-13-inch baking dish.

2. Combine the vegetables and orzo. Add the onion, bell pepper, garlic, squash, dry orzo, oregano, thyme, black pepper, and olive oil to the dish. Toss until the orzo and vegetables are evenly distributed.

3. Add the liquid. Pour in the warm broth and crushed tomatoes. Stir thoroughly, scraping along the bottom so no dry orzo remains trapped beneath the vegetables. Spread the mixture into an even layer. Most of the orzo should sit below the liquid.

4. Cover and bake. Seal the dish tightly with foil and bake for 35 minutes. Carefully lift the foil away from you to avoid the steam. Stir from the bottom, then test a squash cube with a fork and taste a piece of orzo. The squash should be close to tender, and the orzo should be partly cooked. If the dish looks dry while the orzo is still firm, stir in a splash of hot broth or water. Cover and bake for another 5 to 10 minutes if the squash is still quite hard.

5. Add the spinach and halloumi. Stir the spinach into the hot orzo until it begins to wilt. Scatter the halloumi across the top. Return the dish to the oven, uncovered, for 10 to 15 minutes, until the orzo and squash are tender and the cheese is hot with some golden edges. For more color, broil briefly while watching closely.

6. Rest and serve. Let the casserole stand for about 5 minutes. Stir in the lemon juice, taste, and add salt only if needed. Finish with parsley if using.

If the orzo is tender but the casserole looks loose when it comes out of the oven, give it the full resting time before adding anything else. The pasta will continue to absorb liquid. If it is still firm and the dish has dried out, add a little hot broth or water, cover, and bake until the orzo is cooked.

Why the timing matters

Cut the squash small enough to cook with the pasta

A 1/2-inch cube is a useful target for this dish. Larger pieces may still be firm when the orzo is ready, while very small pieces can lose their shape during stirring. Try to keep the cubes reasonably even so you are not waiting on a few oversized pieces.

The covered first stage gives the squash moist heat and keeps the orzo from drying out. Test both before adding the cheese. If the squash needs more time, it is better to give it that time under foil than to put the halloumi on early and leave it in the oven for the entire bake.

Precut squash is convenient, but packaged cubes are often larger than this recipe calls for. Cut them down before adding them to the dish.

Give the orzo enough liquid, then check it

The recipe uses 2 3/4 cups broth plus 1 cup crushed tomatoes for 8 ounces of dry orzo. That is a starting point for this combination of pasta, squash, and baking dish, not a universal ratio for baked orzo. The tomatoes contribute moisture, and the covered dish limits evaporation, but the vegetables and pasta still absorb liquid as they cook.

Stirring after the first 35 minutes matters. Orzo left above the liquid can stay firm, and pasta settled against the bottom can clump. A thorough stir redistributes it and gives you a chance to judge whether the dish needs more hot liquid. Add liquid in small amounts; a casserole that looks slightly loose while the orzo is cooking may thicken considerably as it rests.

Save the halloumi for the uncovered finish

Halloumi holds its shape when heated, which makes it well suited to topping a casserole. It can also become firmer and chewier with prolonged cooking. Adding it for the final 10 to 15 minutes gives it time to heat through and pick up color without baking it for as long as the squash.

The cheese is salty, so the recipe does not call for salt at the start. Broth brands vary, and the finished dish is easier to season accurately after the halloumi has been added.

Vegetables and cheese substitutions

The onion and bell pepper can bake from the start. Spinach goes in near the end because it wilts quickly. Chopped kale can take spinach’s place, though it may need a few extra minutes to soften. Small broccoli florets or sliced zucchini can also work; add them when you first uncover the dish so they do not spend the full covered bake in the oven. Keep additions modest, since a large amount of extra vegetables can change how much liquid remains for the orzo.

If halloumi is unavailable, paneer is the closest choice here for a cheese that keeps its shape. It is milder, so taste the finished casserole and adjust the seasoning. Feta gives a saltier, softer topping; scatter it on for the final few minutes rather than expecting it to brown like halloumi. For a dairy-free version, use cooked chickpeas in place of the cheese and season the casserole to taste. Chickpeas will make a different dish, but they add substance without changing the basic baking method.

Storage and reheating

Refrigerate leftovers promptly in a covered container and use them within 3 to 4 days. The orzo will absorb more liquid as it sits. To reheat, add a splash of water or broth and warm the casserole until hot throughout, either covered in the oven or in a microwave-safe dish. Halloumi will be firmer after reheating than it is when freshly baked.

For the best texture on the first night, serve the casserole after its short rest, while the squash is tender and the halloumi is still warm. The small squash cubes and late addition of cheese are what let both finish well in the same dish.