Add tomatoes, onion, and garlic to a blender, blend until smooth.
Press sauté mode of your instant pot. When hot add oil in inner steel pot.
Add fideo noodles and stir constantly until golden light brown, 3 to 5 minutes.
Pour tomato - onion mixture. Stir and bring to a slight boil.
Add in the vegetable stock, salt, cumin powder, paprika and cilantro to noodle mixture and stir. Press Cancel.
Pressure cook for 4 minutes on high.
Allow pressure to release naturally for 5 minutes, then do a quick-release remaining pressure.
Ladle soup into bowls squeeze lime juice as desired and garnish with cilantro to serve.
If you want to have fun with toppings, try a few chunks of avocado, some crumbled queso fresco, or even a few tortilla chips