Preheat the oven to 380F.

Place the zucchini in a large plastic bag together with the olive oil, paprika, onion powder, and salt and pepper. Seal the bag and spread the seasoning over the zucchini.

Transfer the zucchini to a baking sheet and roast for 25 minutes.

About five minutes before the zucchini is ready, melt some cream cheese into some heavy cream in a skillet over a medium heat. Use a whisk to make sure that the sauce is smooth. 

Add the ketchup (or tomato paste), and season with salt and pepper.

Spoon the cooked zucchini into the sauce, and turn to coat. Garnish with a few red pepper flakes.