Tomatoes blended with broth and poured over rice that has been toasted in oil with onion. The colour comes from the tomato rather than from any colouring. Half an hour.
The tomatoes are part of the liquid, not an extra. That is the point people miss and it is why this rice used to come out heavy. Three ripe tomatoes blended give about a cup of purée, so they and the broth together have to add up to the three cups that a cup and a half of rice needs. Measure what comes out of the blender if you are unsure. Different tomatoes give different amounts, and it is easier to top up with a splash of broth than to rescue a wet pot. Toasting the rice in oil first is what keeps the grains separate. The Spanish for it is nacarar, to pearl, because the grain turns from chalky to translucent as it happens. Cover the pot when the liquid falls to the level of the rice, with craters on the surface, and not when the pot is dry: by then the bottom has begun to stick. The paprika goes on at the end, over the served rice, for colour rather than flavour.