Bring the vegetable broth to a boil, add the quinoa, reduce the heat and simmer for 15 mins. Add the red pepper flakes, paprika, parsley, salt, pepper, milk, and ½ the cheddar cheese, and stir until creamy and smooth.
Heat the oven to 400 F, place the broccoli florets on a parchment paper-lined baking sheet, drizzle with oil, season with salt, and roast for 20 mins or until slightly charred.
Melt the butter in a small skillet and saute the garlic for 30 seconds. Add the breadcrumbs and cook until lightly toasted. Set aside.
Place the creamy quinoa in a pie dish, top with the roasted broccoli, sprinkle the remaining half of the cheddar cheese, and sprinkle the toasted breadcrumbs on top. Bake for 20-25 minutes or until hot, bubbly, and the cheese is melted and slightly brown.