Get that cauliflower roasting right away: preheat oven to 450° Fahrenheit (230° Celsius).
Place florets on a rimmed cookie sheet, drizzle generously with olive oil (2-3 tablespoons) and season with salt and pepper. Roast for 20 minutes, flipping cauli halfway through cooking time if you want a nice even browning.
Meanwhile, heat another good drizzle of olive oil in a large skillet over medium heat and fry sausages until golden brown on each side, about 4 minutes a side.
Turn heat down to low and add pizza sauce, olives, artichokes and spinach and stir occasionally while cauliflower cooks.
To serve, divide pizza sauce veggies between plates and top with cauliflower. Squeeze a bit of lemon over the dish and sprinkle chile flakes to taste.
Notes
Gluten Free Option: Substitute 2-398ml (14oz) cans of chickpeas for sausageMake it go farther:If you serve this with some rice or quinoa, it will easily feed six!