Boil elbow macaroni in plenty of salted water until al dente. Drain. Grease a 9 X 13-inch pyrex baking dish. Preheat oven to 375degreesF. Meanwhile, in a small processor, combine milk, cream cheese, mustard, garlic, hot sauce and salt. Pour drained pasta and milk/cream cheese mixture back into pot pasta was cooked in . Allow to 'sit' in pot for 15 minutes, stirring occasionally. This is an important step and must not be left out as it allows the sauce to start thickening and be absorbed by the pasta and not just settle in the bottom of the baking dish. After 15 minutes, add various cheeses and beaten eggs and mix well altogether. Pour into prepared baking dish. Bake until golden-brown and bubbly, about 20-25 minutes. Note: This recipe can be made even more decadent by browning 1/2 cup of dry breadcrumbs in 1 tblsp melted butter in a small skillet. Stir in 1/4 cup parmesan cheese at the end and sprinkle over mac and cheese for final 10 minutes of baking.