Add 1/2 stick of butter to pan and sauté onion and rice in a skillet for about 3-4 minutes. Add sliced mushrooms with the liquid and sauté an additional 3-4 minutes or so, until liquid is mostly gone.
Spray a thin coating of oil in an 8x8 baking dish. Pour consommé and French onion soup into a 8 x 8 baking dish, add pepper, Worcestershire sauce, parsley, thyme, garlic powder and stir well. Add sautéed rice and veggies rice and stir well.
Cut up remaining butter in TB sizes and place on top of the mixture of the mixture.
Cover with foil, and place in a 400 deg oven for 30 minutes, remove foil, fluff and back in the oven 30 more minutes.