"Create a dairy-free, wheat-free, corn-free, from-scratch version of Camp David Spaghetti with Italian Sausage inspired by the linked recipe. Keep it beginner-friendly, quick/easy (15-30 min if possible), and suitable for a household of 3. Use minimal processing and low-inflammatory ingredients where possible. Avoid all gluten, dairy, nuts, shellfish, soy, sesame, and corn. Use imperial units only. Include a homemade sauce from scratch rather than jarred sauce, and use a gluten-free pasta alternative that is wheat-free and corn-free. Keep the flavor profile Italian-American with sausage and tomato sauce."