Heat oil in a 5-quart Dutch oven over medium heat. Cook onion and bell pepper for 5 minutes until softened at the edges.
Stir in garlic, cumin, paprika and salt for 30 seconds, then add rinsed quinoa and stir for 1 minute.
Measure reserved tomato juices into a jug and add only enough broth to reach 2 cups total liquid. Add that liquid, drained tomatoes, black beans and corn to the pot.
Bring to a simmer, cover tightly and cook over low heat for 18 to 20 minutes until quinoa is tender with visible curled germ rings and the liquid is absorbed.
Remove from the heat and rest covered for 5 minutes. Fold in lime juice, fluff gently and divide among 4 bowls.