"Create a beginner-friendly, quick and easy (15-30 min active time) dairy-free, corn-free, wheat-free recipe for herbed roasted beef tenderloin with potatoes, roasted carrots, and Brussels sprouts. Use minimal processing, low-inflammation-friendly ingredients, and imperial units. Include clear ingredient amounts, simple steps, oven roasting instructions, and seasoning that avoids gluten, dairy, nuts, soy, sesame, and corn. Make it suitable for a household of 3."