The two Vietnamese restaurants in Amarillo that I was getting phở soup have gone out of business, so I devised a similar soup of my own.
I cook a buffalo steak and then save the pan drippings for this soup.
I use two box mixes:
       Thai Kitchen Bangkok Curry (Dry)
       Lipton's 'Recipe Secrets' Onion Soup Mix (Dry)
Sauté one fourth of a white onion that is diced finely.
During the onion saute process add 1 teaspoon of olive oil and two tablespoons of water.
Season with:
       Garlic powder 
       Black Pepper
       Oregano
       Thyme
       Sweet Basil 
       Bay Leaf
       Tabasco Sauce
       Worcestershire Sauce
       Oyster Sauce, one teaspoon (Brand: KA-ME, by Panos Brands) 
       Add Buffalo steak pan drippings
Watch the liquid level and add just enough water to keep from scorching onions. 
MEAT OPTION: I added some left-over pork roast at this point, about an 1/8 of a pound, shredded
After the onions are soft (20-30 minutes), add two cups of water and bring to a boil.
Add half of a package of Lipton's Onion Soup Mix (Two packages per box, so 1/4 of the box contents)
Simmer for 10 minutes
Add the dry powder and oil seasoning of the Thai Kitchen Bangkok Curry mix, stirring frequently to dissolve powder.
After a minute of stirring, add the rice noodles of the Thai Kitchen Bangkok Curry package.
Cook on high heat for 3 minutes with constant stirring.
Serves One
OPTION SPICE: Add sliced fresh jalapeño peppers if desired (I just happened to be out when I devised this recipe this morning)