Cook butter, oil and onion until soft in skillet. Mix in oregano, garlic and artichokes. Sauté 5-10 minute. Grease (or use non stick spray) a 1 1/2-2 quart round baking pan (or 8x8 baking dish). Coat sides and bottom with 1/4 cup parmesan cheese. Spoon artichoke mixture over the bottom. Beat eggs, milk, salt, pepper and nutmeg. Mix in jack cheese and 1/4 cup parmesan cheese. Pour egg mixture over artichokes. Bake at 350 for 30 minutes. Sprinkle remaining 1/4 cup parmesan cheese on top. Bake 5-8 more minutes. *You can double the recipe and use 9x13 baking dish.