Cook your pasta according to the instructions on the box. Drain and place in a greased medium sized casserole dish.
Time to make your cheese sauce, which is the base of any white sauce out there, your basic roux. Start with your butter in a pot, and heat it until it's melted, then stir in the flour.
Add in a very, VERY small amount of milk. Just enough to mix it in. Keep adding a small bit of milk at a time, constantly stirring, until you have added it all and the mixture is smooth.
Add in your cup of juice and stir well. Add in the shredded cheese, stirring to melt it in completely.
Once the cheese has melted and the sauce has thickened, pour over the noodles in the casserole. Stir, then add in the stewed tomatoes.
Top with the extra cheese.
Bake covered in the oven for 20-25 minutes, then uncover and let the cheese melt and brown for another 10-15 minutes. Serve and enjoy!