"Create a beginner-friendly Italian Sausage Stew with Summer Vegetables recipe for 3 people, using imperial units, quick and easy (15-30 minutes), minimal processing, low inflammation, and avoiding gluten, dairy, nuts, shellfish, and corn. Adapt the provided method: sauté onion and garlic in a dairy-free fat, brown Italian sausage, add chili powder, bell peppers, zucchini, and tomatoes, and replace corn with a suitable vegetable alternative such as diced yellow summer squash or extra zucchini. Include clear ingredients and concise steps."