Aromatics: In a medium saucepan, heat the avocado oil over medium-high heat. Sauté the yellow onion and garlic cloves for 1 minute. Add the zucchini and fideo pasta and sauté until the noodles turn very light brown, 1 to 2 minutes.
Make the Soup: Add the tomatoes, ground cumin, vegetable broth, and tomato sauce and stir until thoroughly combined. Add kosher salt to taste, if necessary.
Simmer & Serve: Bring to a boil, cover with a lid, reduce the heat to low, and let simmer until the noodles have softened, about 10 minutes.
