Hello Emma. You can absolutely make a delicious and satisfying paella on a weeknight using everyday kitchen equipment and budget-friendly supermarket ingredients. You do not need a dedicated paellera or expensive imported Bomba rice to achieve great results.
Regarding the rice, standard medium-grain white rice (such as Calrose) is your best and most accessible budget substitute. It absorbs liquid nicely while holding its shape well. If your discount supermarket only carries cheap risotto rice like Arborio, you can certainly use it, but with one important rule: keep your hands off the spoon. Arborio releases starch very easily, which is great for creamy risotto but counterproductive for paella. To keep it from turning into mush, do not wash the rice beforehand, keep your liquid ratio around two parts hot broth to one part rice, and do not stir the pan once the liquid is added. Another foolproof option for beginners is parboiled long-grain rice, which is virtually impossible to overcook into mush, though it will absorb slightly less flavor than medium-grain rice.
To make this successfully in standard cookware, choose your widest skillet. A 10-inch or 12-inch stainless steel, cast iron, or heavy nonstick pan works perfectly. The wider the pan, the thinner the layer of rice will be, which ensures even cooking without needing to agitate the grains.
Here is a simple, step-by-step approach for your weeknight version:
1. Build the flavor base (sofrito). Heat two tablespoons of olive oil over medium heat in your skillet. Sauté finely diced onion and minced garlic until soft, then stir in some finely chopped or grated tomato (or a tablespoon of tomato paste) and a generous teaspoon of smoked paprika. Let this cook down until thick and fragrant.
2. Toast the rice. Pour in your dry rice and stir it into the sofrito for one to two minutes so every grain is coated in oil and lightly toasted.
3. Add liquid and ingredients. Distribute your leftover chicken and vegetables evenly across the pan. Pour in hot chicken or vegetable broth (warmed beforehand so it does not drop the pan's temperature). Give the pan a gentle shake by the handle to settle the rice into an even layer, then do not stir again.
4. Simmer gently. Let the pan simmer uncovered over medium-low heat for roughly 15 to 18 minutes until most of the broth is absorbed. If the top grains are still slightly firm when the liquid is nearly gone, cover the pan loosely with foil or a lid for the last few minutes to let the steam finish cooking them.
5. Form the crust (socarrat). In the final minute or two, turn the heat up to medium-high. Listen closely for a distinct crackling sound and watch for a nutty, toasted aroma. As soon as you hear that crackle, take the skillet off the heat so it does not burn.
Let the pan rest for about five minutes before serving. I hope this gives you the confidence to put together a great meal tonight. Please let me know if you would like any further clarification.