Bring 8 cups of water to a boil in a large soup pot.
Add a ¼ cup of soup base, a protein of choice, and the onion and mushrooms to the water.
Let the soup simmer for about 15 minutes or until the onion is translucent.
While the soup simmers, cook the rice noodles according to package directions and set aside.
Add halved cherry tomatoes and simmer for 5 more minutes.
Serve over rice noodles
Garnish with cilantro and a squeeze of lime.
Notes
This makes a big pot of soup. It tastes great the next day and works well for lunches.
I like to keep the noodles and soup separate so the noodles don't get overcooked when reheating. If you think you will eat it all in 1 sitting, you can add the noodles to the broth.