Ingredients
Scale
- For the Rice:
- 1.5 cups Long-Grain White Rice (or Brown Rice, see Tips/FAQ)
- 3 cups Vegetable Broth (low sodium preferred)
- 1 tbsp Olive Oil or Butter
- For the Vegetable Sauté:
- 2 tbsp Olive Oil
- 1 large Yellow Onion, finely chopped (about 1.5 cups)
- 2–3 cloves Garlic, minced
- 1 Red Bell Pepper, seeded and diced (about 1 cup)
- 1 Green Bell Pepper, seeded and diced (about 1 cup)
- 8 oz Cremini Mushrooms, cleaned and sliced
- 1 medium Zucchini, diced (about 1.5 cups)
- 1 tsp Dried Oregano
- 1/2 tsp Dried Thyme
- 1/2 tsp Smoked Paprika (optional, for depth)
- Salt and Freshly Ground Black Pepper to taste
- 5 oz Fresh Spinach, roughly chopped
- For the Cheese Sauce:
- 3 tbsp Unsalted Butter
- 3 tbsp All-Purpose Flour
- 2 cups Milk (whole or 2% recommended for richness)
- 1 cup Vegetable Broth (low sodium)
- 1 cup Shredded Sharp Cheddar Cheese
- 1 cup Shredded Monterey Jack Cheese (or Gruyere, Fontina)
- 1/2 cup Grated Parmesan Cheese, divided
- 1/4 tsp Nutmeg (optional, enhances cheesy flavor)
- Salt and Freshly Ground Black Pepper to taste
- For the Topping:
- 1 cup Panko Breadcrumbs (or regular breadcrumbs)
- 2 tbsp Melted Unsalted Butter
- Remaining 1/4 cup Grated Parmesan Cheese
- Fresh Parsley, chopped (for garnish, optional)
Instructions
- Cook the Rice: In a medium saucepan, heat 1 tbsp olive oil or butter over medium heat. Add the uncooked rice and toast for 1-2 minutes, stirring constantly, until fragrant. Pour in the 3 cups of vegetable broth, bring to a boil, then reduce heat to low, cover tightly, and simmer for 15-20 minutes (or according to package directions for your specific rice). The goal is slightly al dente rice, as it will cook further in the oven. Once cooked, fluff the rice with a fork and set aside. Note: If using brown rice, adjust cooking time and liquid as needed, typically requiring longer simmering.
- Preheat Oven & Prepare Dish: Preheat your oven to 375°F (190°C). Lightly grease a 9×13 inch (or similar 3-quart) casserole dish.
- Sauté the Vegetables: While the rice cooks, heat 2 tbsp olive oil in a large skillet or Dutch oven over medium-high heat. Add the chopped onion and sauté for 3-4 minutes until softened and translucent. Add the minced garlic and cook for another minute until fragrant.
- Cook Down Vegetables: Add the diced bell peppers, sliced mushrooms, and diced zucchini to the skillet. Cook, stirring occasionally, for 7-10 minutes, until the vegetables are tender-crisp and the mushrooms have released their liquid and started to brown.
- Add Seasonings and Spinach: Stir in the dried oregano, dried thyme, smoked paprika (if using), salt, and pepper. Cook for 1 minute more to toast the spices. Add the fresh spinach in batches, stirring until it wilts down completely. Remove the skillet from heat and set aside.
- Prepare the Cheese Sauce (Béchamel Base): In a separate medium saucepan, melt 3 tbsp of butter over medium heat. Once melted, whisk in the 3 tbsp of all-purpose flour. Cook the flour-butter mixture (roux) for 1-2 minutes, whisking constantly, until it’s lightly golden and smells nutty – this cooks out the raw flour taste.
- Gradually Add Liquids: Slowly whisk in the 2 cups of milk, a little at a time, ensuring no lumps form. Once all the milk is incorporated and the mixture is smooth, gradually whisk in the 1 cup of vegetable broth.
- Thicken and Season the Sauce: Bring the sauce to a gentle simmer, whisking frequently. Let it simmer for 3-5 minutes, until it has thickened enough to coat the back of a spoon. Reduce the heat to low.
- Melt in the Cheeses: Remove the saucepan from the heat temporarily (to prevent scorching). Stir in the shredded cheddar, shredded Monterey Jack, and 1/4 cup of the grated Parmesan cheese. Stir until the cheeses are fully melted and the sauce is smooth and creamy. Stir in the nutmeg (if using), and taste for seasoning, adding more salt and pepper if needed. Remember the rice and veggies are seasoned, but the sauce should be flavorful on its own.
- Combine Casserole Components: In a large mixing bowl (or directly in the large skillet if it’s oven-safe and big enough), combine the cooked rice, the sautéed vegetable mixture, and the prepared cheese sauce. Gently stir everything together until well combined and the rice and vegetables are evenly coated in the sauce.
- Transfer to Baking Dish: Pour the mixture into the prepared casserole dish, spreading it evenly.
- Prepare the Topping: In a small bowl, combine the Panko breadcrumbs, 2 tbsp melted butter, and the remaining 1/4 cup of grated Parmesan cheese. Toss together until the breadcrumbs are evenly moistened. Sprinkle this mixture evenly over the top of the casserole.
- Bake the Casserole: Place the casserole dish in the preheated oven. Bake for 25-35 minutes, or until the filling is hot and bubbly around the edges, and the Panko topping is golden brown and crispy. If the top starts browning too quickly, you can loosely tent it with foil.
- Rest Before Serving: Carefully remove the casserole from the oven. Let it rest for 10-15 minutes before serving. This allows the sauce to set slightly, making it easier to serve and preventing it from being too molten hot.
- Garnish and Serve: Garnish with fresh chopped parsley, if desired, just before serving.
Nutrition
- Serving Size: one normal portion
- Calories: 450-550