Preheat the oven to 400 degrees F.
On a large sheet pan (or two baking sheets), add the sweetpotatoes, red bell pepper, yellow bell pepper, and red onion, keeping the vegetables separated by type.
Drizzle with olive oil and sprinkle with salt and pepper. Use your hands or tongs to toss the vegetables in each section to ensure the oil and seasonings are well distributed.
Bake the vegetables at 400 degrees F for 18 to 25 minutes, tossing once about halfway through, until all the vegetables are cooked through and tender.
Meanwhile, prepare the spread. In a small bowl, mix the light sour cream, dried minced onion, onion powder, dried parsley, salt, and pepper.
When the vegetables are done roasting, prepare as many tortillas as you plan to eat at that time. Put a thin layer of spread on each tortilla, then add the vegetables one color at a time to the tortilla, including the fresh spinach and fresh shredded purple cabbage.
Roll the tortillas tightly, then slice with a serrated knife into approximately 1-inch-thick pieces. Serve immediately and enjoy!