"Create a from-scratch, dairy-free, wheat-free, corn-free version of Allrecipes 'Quick and Easy Spinach Casserole' using whole/minimally processed ingredients. Keep it beginner-friendly and suitable for a household of 3. Use imperial units only. Avoid gluten, dairy, nuts, shellfish, soy, sesame, and corn. Aim for a quick, easy casserole-style side dish with familiar spinach casserole flavor and texture, using safe substitutes for creaminess and binding without packaged mixes. Include clear ingredient amounts, simple steps, bake temperature/time, and optional garnish if appropriate."