"Create a gluten-free, dairy-free, corn-free borscht recipe for a beginner cook, serving 3 people. Keep it quick and easy (15-30 minutes active time if possible), use minimal processing, and make it suitable for a low-inflammation, rotation-diet style meal. Include beets, cabbage, carrots, onion, garlic, tomato, broth, and optional protein if appropriate. Avoid gluten, dairy, nuts, shellfish, and corn entirely. Use imperial units only. Provide clear ingredients, simple steps, and a brief note for serving."