• Ready to make this delicious casserole? Here’s how you do it:

Step 1: Preheat Your Oven

• First things first, preheat your oven to 350°F (175°C). This ensures that your casserole will bake evenly and achieve that perfect golden crust.

Step 2: Prepare the Rice

• Cook your long-grain rice according to the package instructions. Make sure it’s fully cooked but not mushy, as it will absorb the flavors of the dish later on.

Step 3: Sauté the Veggies

• In a large skillet, add a splash of oil. Sauté the finely chopped celery, diced yellow onion, and minced garlic until they’re soft and fragrant. This step adds a punch of flavor to your casserole.

Step 4: Mix the Wet Ingredients

• In a large bowl, combine the whole milk, condensed cream of mushroom soup, and condensed cream of celery soup. Stir in the dried basil and dried thyme. If you like a zesty kick, add a tablespoon of lemon juice.

Step 5: Combine Everything

• Add the cooked rice, sautéed veggies, well-drained tuna, chopped red bell pepper, and frozen peas (if using) to the bowl with the wet ingredients. Mix until everything is well-incorporated.

Step 6: Season and Transfer

• Season the mixture with sea salt and freshly ground black pepper. Transfer everything to a greased baking dish. Spread it out evenly to ensure each bite is consistent.

Step 7: Bake to Perfection

• Bake in your preheated oven for about 30-35 minutes. You’ll know it’s ready when the top is slightly golden and the sides are bubbling.

Step 8: Cool and Serve

• Let it cool for a few minutes before serving. This will make it easier to scoop out and will allow the flavors to meld together perfectly.