Vegetable and rice casserole combines brown rice, carrots, broccoli, peas, mushroom soup, fresh parsley, Parmesan, and sharp cheddar in a large family-style bake. The vegetables are cooked in stages before the casserole enters the oven, so the final bake is mainly for heating the center and browning the cheese.
Instant brown rice is important to the stated quantities because it has a different cooking yield from regular dry rice. With the rice prepared and the carrots properly softened, the mixture stays creamy without leaving hard grains or crunchy vegetables. The recipe fills a 9-by-13-inch dish and makes about ten servings.
Ingredients for Vegetable and Rice Casserole
Use 3 cups uncooked instant brown rice, prepared according to its package. The vegetable base needs 2 tablespoons olive oil, two diced yellow onions, eight minced garlic cloves, 3 1/2 cups peeled diced carrots, 1 teaspoon salt, and 1/4 teaspoon black pepper.
Add one 10-ounce bag frozen broccoli florets, one 10-ounce bag frozen peas, two 10.5-ounce cans cream of mushroom soup, and 3/4 cup chopped fresh parsley. Prepare 2 1/2 cups freshly grated Parmesan and 2 cups freshly grated sharp cheddar, both divided between the filling and topping.
If you enjoy this recipe, you may also like BBQ Smash Burgers.
How to Make Vegetable Rice Casserole
- Cook the rice. Prepare 3 cups dry instant brown rice according to the package and set it aside.
- Soften the vegetables. Cook onion, garlic, carrots, olive oil, salt, and pepper over medium-high for 10 to 15 minutes.
- Make the creamy base. Add frozen broccoli, peas, mushroom soup, 1 1/2 cups Parmesan, and 1 cup cheddar. Cook 10 to 12 minutes until hot.
- Combine. Fold in cooked rice and parsley.
- Assemble. Spread in a greased 9-by-13-inch casserole dish. Top with the remaining 1 cup Parmesan and 1 cup cheddar.
- Bake. Bake at 400°F for 10 to 15 minutes until bubbling and golden. Rest briefly before serving.
For storage details after serving, the USDA leftovers and food safety guidance.
Use Instant Brown Rice
The recipe calls for 3 cups of uncooked instant brown rice, not 3 cups of already cooked rice. Prepare it exactly as directed on the package, because brands may use different water ratios. Regular long-cooking brown rice has a different yield and timing and should not be exchanged cup for cup.
Fluff the cooked rice and let excess steam escape while the vegetables cook. Slightly dry, separate grains fold into the creamy base more evenly than very wet rice.
If you enjoy this recipe, you may also like Chicken Bacon Ranch Calzone.
Give Carrots a Head Start
Heat the olive oil in a large skillet or Dutch oven and add onion, garlic, diced carrots, salt, and pepper. Keep the carrot pieces small and uniform so they soften within 10 to 15 minutes. Stir regularly and adjust the heat if the garlic begins to darken.
The onions should become translucent and the carrots should be nearly tender before frozen vegetables enter. The short oven time will not correct undercooked carrots later, so test one with the tip of a knife.
Heat the Frozen Vegetables Thoroughly
Add frozen broccoli and peas directly to the softened carrot mixture. Small florets distribute best; cut unusually large frozen pieces before adding them. Stir in both cans of mushroom soup, 1 1/2 cups Parmesan, and 1 cup cheddar.
Cook over medium heat for 10 to 12 minutes, stirring from the bottom, until the frozen vegetables are hot and the cheese has melted into the soup. The mixture should steam evenly before it leaves the stove.
Fold in Rice and Parsley
Add the cooked brown rice in several portions rather than one dense mound. Fold after each addition so the creamy vegetables coat the grains without crushing them. Scrape around the sides and bottom to eliminate pockets of plain rice.
Fresh parsley goes in last to retain some color and clean herbal flavor. Taste now and adjust salt and pepper. Parmesan, cheddar, and canned soup can all be salty, so additional seasoning may not be needed.
Build an Even Casserole
Grease a 9-by-13-inch dish and spread the mixture into the corners. Level the top so the center and edges heat at the same rate. Sprinkle the reserved 1 cup Parmesan and 1 cup cheddar evenly over the surface.
Freshly grated cheese melts into a more cohesive topping than pre-shredded cheese. Distribute both varieties all the way to the edges so every portion receives some crisp, browned cheese.
Bake Until Bubbling
Bake the assembled casserole at 400°F for 10 to 15 minutes. Because the filling is already hot, look for bubbling around the perimeter and golden spots across the cheese rather than relying only on time. A refrigerated casserole needs longer.
Rest the dish for five to ten minutes after baking. The filling is very hot and the pause helps it settle, making squares easier to lift without running across the plate.
Serve a Crowd
The casserole makes approximately ten servings and works well at potlucks or holiday meals. It can serve as a vegetarian main dish with a crisp salad, or as a substantial side beside roast chicken, turkey, ham, or baked fish.
Its creamy texture pairs best with something fresh or acidic. Tomato salad, lemon-dressed greens, pickled vegetables, or simple sliced fruit can balance the rich cheese and mushroom base.
Make Ahead
Prepare the entire casserole through the cheese topping, cool it, cover, and refrigerate for up to one day. Take the dish from the refrigerator while the oven heats. Bake until the center reaches a safe hot temperature and the edges bubble, usually five to ten minutes longer than the fresh version.
If the baking dish is glass, avoid moving it directly from a very cold refrigerator into extreme heat unless the manufacturer confirms that use is safe. A metal pan is more forgiving.
Storage and Variations
Refrigerate leftovers for up to four days. Reheat individual portions in the microwave or cover the dish and warm it in a 350°F oven. A spoonful of broth or milk can restore moisture if the rice has absorbed more sauce.
Frozen cauliflower, green beans, or corn can replace part of the broccoli or peas. Keep the overall vegetable volume similar and cook everything until hot before assembly. Check labels if gluten is a concern, because standard cream of mushroom soup often contains wheat.
Conclusion
Cook instant brown rice separately. Soften onions, garlic, and carrots, then heat broccoli, peas, mushroom soup, and part of the Parmesan and cheddar in the same pan. Fold in rice and parsley, transfer to a 9-by-13-inch dish, top with remaining cheese, and bake at 400°F for 10 to 15 minutes.
Frequently Asked Questions
- → Can I use regular brown rice?
Not cup for cup. The recipe is measured for instant brown rice, which has a different cooking time and yield. If substituting, prepare enough regular rice to match the cooked volume.
- → Can I assemble the casserole ahead?
Yes. Cover and refrigerate it for one day, then bake until the center is hot and the edges bubble, allowing extra time from cold.
- → Can I change the vegetables?
Yes. Substitute frozen cauliflower, corn, or green beans while keeping the total vegetable quantity close to the original.
- → How long do leftovers last?
Keep them covered in the refrigerator for up to four days and reheat only the amount needed.