Preheat oven to 350 Degrees F
Drizzle oil over a cookie sheet and spread it out with a napkin
Add cauliflower steaks and mushrooms to the cookie sheet
Sprinkle garlic salt, garlic powder, and Italian seasoning over vegetables
Drizzle oil over the top of the veggies
Roast veggies in the oven until golden, approximately 25-30minutes
Spread a generous portion of pasta sauce over the bottom of the Pyrex dish
Place cauliflower steak, then mushrooms over the sauce
Add cheese on top of the veggies
Add more pasta sauce over the veggies
Add more cheese to the top of the dish
Bake the dish in the oven for 30-40 minutes.
Serve immediately or refrigerate to serve later. Enjoy left overs for several days.