Lasagna Recipe – Beef & Cheese Lasagna
From Chef John from Food Wishes, http://foodwishes.blogspot.com/2010/12/christmas-lasagna.html

Ingredients (for a deep 15″ x 10″ lasagna pan):
For the meat sauce:
1 pound Italian sausage
1 1/2 pound lean ground beef
8 oz mushrooms, chopped
1 teaspoon salt
1/2 freshly ground black pepper
1/4 teaspoon red pepper flakes
6 cups marinara sauce
1/2 cup water
Note: depending on the seasoning of your sausage, you can add 1/2 teaspoon of an Italian dried herb blend.
For the cheese filling:
2 egg, beaten
2 lbs ricotta cheese
8 oz mozzarella cheese, cubed
2/3 cup freshly grated Reggiano-Parmigiano
1/4 cup chopped fresh parsley
1 teaspoon salt
1/4 teaspoon freshly ground black pepper
big pinch of cayenne
The rest:
1 lb lasagna noodles
8 oz mozzarella cheese, torn in small pieces
1/2 cup grated Parmesan cheese to top