Italian Sausage Casserole

(about 10-12 pieces) good quality Italian Sausages, left whole or sliced into bite sized pieces if preferred

Olive Oil

large Onion, chopped

Garlic, chopped

Mushrooms, sliced

dry red Wine (use gluten-free if on that diet)

cooking Spinach, fresh or frozen (if frozen, defrost and drain well)

unsalted crushed Tomatoes (can use canned Tomatoes)

fresh Sprigs of Rosemary (or 1 teaspoon dried or to taste)

Bay leaves

fresh Basil (optional but encouraged!)

Salt, pepper and a little sugar (latter is optional and maybe left-out if doing low-carb), to taste