This is the altered recipe I use. I never find the jumbo noodle recipes as flavorful as I liked, so I experimented a bit.
(I will add a pic next time I make it.)
Ingredients
1 Jar Spaghetti sauce or at least 20 ounces of tomato based sauce (I like the Roasted Garlic Parmesan by Prego)
1 box of jumbo shells
1 pound Ground Beef
1/2 cup chopped cilantro
1/2 cup chopped white onion
1 tablespoon black ground pepper
1 large can of mushrooms (stems and pieces)
1 cup cheddar cheese
3 packages cream cheese
1 cup mozzarella cheese
1 cup grated parmesan
Mixing Instructions
1. Brown beef with chopped onion, pepper, and mushrooms. Add cilantro towards the end of the browning. Set aside when done.
2. Remove cream cheese from packages and soften for at least 2 minutes on medium in the microwave.
3. In a large bowl combine cheddar cheese, mozzarella cheese, parmesan, and cream cheese. Mix well.
4. Combine browned meat and cheese filling in the large bowl
5. Put shells in a large container and boil until firm. Drain and rinse in cool water.
6. When shells are done, take a small spoon and fill with your meat and cheese filling. Place in a large
baking pan with filling side facing upwards. Two baking pans may be needed.
7. Preheat oven to 325 degrees Fahrenheit.
8. Once shells are placed in pans, pour layer of spaghetti/ tomato based sauce
9. Bake for 25 minutes and serve. Makes about 6-8 servings.
If you try this out, tell me if you liked it. 
