"Create a dairy-free, corn-free, wheat-free from-scratch version of a make-ahead slow cooker beef stew inspired by the linked Allrecipes recipe. Use minimal processing, beginner-friendly steps, and keep it suitable for a household of 3 with moderate budget concerns. Avoid all gluten, dairy, nuts, shellfish, soy, sesame, and corn ingredients. Use imperial units only. Include beef, potatoes, carrots, onion, celery, garlic, broth made from scratch or a clean store-bought broth without prohibited ingredients, and a thickening method that does not use wheat flour or cornstarch. Keep it low-inflammatory, hearty, and designed for slow cooker prep with make-ahead instructions."