Roasted Cauliflower Red Pepper Soup

medium head cauliflower, cut into florets

olive oil, divided

Salt and black pepper,

small yellow onion, chopped

garlic, minced

fresh thyme leaves

crushed red pepper flakes

jar roasted red peppers, drained and chopped

vegetable broth

paprika

chopped basil

shredded Gouda cheese

Salt and pepper,

Shredded Gouda and chopped basil, for garnish, if desired