Soak the saffron: place the pinch of saffron threads in 1 tablespoon of warm (not boiling) water and let sit while you prep (at least 5–10 minutes). This softens the threads and releases the color and floral aroma — saffron needs time to bloom to give maximum flavor and color to the rice and broth.

Clean and check shellfish: discard any mussels or clams with cracked shells or that do not close with a firm tap. This is food-safety critical: live shellfish should close when tapped. Keep the shellfish refrigerated until ready to cook.

Start the tomato rice base: heat 1 tablespoon extra-virgin olive oil in a medium saucepan over medium heat. Add the finely minced shallot and a pinch of salt and sweat gently for 2–3 minutes until translucent (not browned). Sweating softens the shallot and releases sweetness without introducing bitter char.

Add the garlic and rice: stir in the minced garlic and cook 30 seconds until fragrant, then add the short-grain rice. Toast the rice, stirring constantly, for 60–90 seconds so each grain becomes lightly glossy from the oil — this coating helps the rice stay separate and adds a gentle nutty flavor.

Build the tomato-saffron liquid: stir in the crushed tomatoes, smoked paprika (toast for 15 seconds with the rice to bloom its smoky oils), the saffron with its soaking water, and 300 ml stock (or water). Scrape any stuck bits from the pot — those brown bits are flavor. Taste and season lightly with salt and pepper; keep in mind the shellfish will add salinity later.

Simmer the rice: bring the pot to a gentle simmer, reduce heat to low, cover and cook for 15–18 minutes without lifting the lid. Short-grain rice becomes tender relatively quickly; cooking covered keeps steam in so the grains cook evenly. At 15 minutes check for tenderness — if still firm, add up to 2–3 tablespoons extra hot stock or reserved shellfish liquid (see step 9) and continue 1–2 minutes.

While the rice cooks, steam the shellfish: heat a wide, heavy pan over medium-high heat with a drizzle (about 1 tsp) of olive oil. Add minced garlic and let it sizzle for 15 seconds to flavor the oil. Add the cleaned mussels and clams, pour in the 1 tablespoon lemon juice plus 3–4 tablespoons water (or 1/8 cup) to create steam, and cover immediately. Cooking the shellfish separately preserves their delicate texture and concentrates their briny liquid.

Steam until open: steam the shellfish, shaking the pan occasionally, for 4–6 minutes until shells have opened. Discard any that remain tightly closed. Cooking is fast — overcooking makes shellfish rubbery, so remove them as soon as they open.

Reserve and strain the broth: once the shellfish are open, remove them with tongs into a bowl and pour the cooking liquid through a fine-mesh sieve into a small cup. If your rice is slightly underdone, add 2–3 tablespoons of this strained liquid to finish the rice and to intensify the seafood flavor. This step ensures you only use the clear, sandy-free liquor.

Finish the rice: when the rice is cooked and the liquid is absorbed, remove the pot from the heat and let it rest, covered, for 4–5 minutes. Resting lets the grains finish steaming and settle. Stir in the lemon zest, chopped parsley, and adjust seasoning with salt and pepper — the lemon brightens the tomato and saffron; parsley adds fresh herb lift.

Plate with care: spoon a generous portion of the tomato-saffron rice onto a warmed plate, arrange the mussels and clams on top, and spoon any remaining strained broth over them to shine. Finish with an extra drizzle of olive oil, a final grind of black pepper, and a scattering of parsley. The presentation — glossy shells and vivid saffron-tinted rice — makes the dish feel special.

Serve immediately: this is best eaten hot so the rice still has body and the shellfish are warm and tender. Offer lemon wedges at the table if you like a brighter finish.