In a medium saucepan, combine the rinsed quinoa and vegetable broth. Bring to a boil, then reduce heat to low. Cover and simmer for about 15 minutes, or until the quinoa has absorbed all the liquid and is fluffy. Set aside.
In a large skillet, heat the olive oil over medium heat. Add the diced onion and bell pepper, sautéing for about 5 minutes until softened.
Stir in the corn, black beans, cumin, paprika, cayenne (if using), lime juice, salt, and pepper. Cook for an additional 5-7 minutes, allowing the flavors to meld together.
To assemble the bowls, start with a base of quinoa, top it with the black bean and corn mixture, and then layer on the diced avocado and cherry tomatoes.
Garnish with fresh cilantro and an extra squeeze of lime if desired.
Notes
Feel free to adjust the spice level by adding more or less cayenne pepper.