Toast the Rice and Sauté the Aromatics: In a large skillet over medium heat, add the olive oil. Once shimmering, add the uncooked rice. Stir frequently for about 3-4 minutes, until the rice becomes lightly golden and fragrant. This toasting step is crucial; it helps the grains remain separate and fluffy after cooking.

Bloom the Spices: Add the chopped onion to the skillet and cook for another 3-4 minutes, until it begins to soften and become translucent. Add the minced garlic, ground cumin, smoked paprika, oregano, and chili powder. Stir constantly for about 1 minute until the spices are incredibly fragrant. This process, known as “blooming,” awakens the essential oils in the spices and infuses the entire dish with flavor.

Combine in the Slow Cooker: Transfer the toasted rice and aromatic mixture from the skillet into the basin of your slow cooker (a 4-quart or larger model is ideal).

Add the Liquids: Pour the undrained diced tomatoes, tomato sauce, and chicken or vegetable broth over the rice mixture. Add the salt, black pepper, and optional jalapeño or green chiles if using.

Stir and Set: Give everything a thorough stir to ensure the rice is fully submerged in the liquid and all ingredients are well combined. Secure the lid on the slow cooker.

Cook: Set the slow cooker to LOW for 2.5 to 3.5 hours or on HIGH for 1.5 to 2 hours. Cooking times can vary slightly depending on the model and age of your slow cooker. Avoid the temptation to lift the lid and peek, as this releases steam and heat, which can affect the cooking process and result in undercooked rice. The rice is done when it is tender and has absorbed most of the liquid.

Rest and Fluff: Once the cooking time is complete, turn off the slow cooker. Let the rice rest with the lid on for an additional 10-15 minutes. This allows the residual steam to finish cooking the grains and results in a fluffier texture. After resting, remove the lid and gently fluff the rice with a fork. Stir in the optional fresh cilantro and a squeeze of lime juice just before serving to brighten up the flavors.