To a blender, add the spinach leaves, basil, queso blanco, garlic cloves, shallot, walnuts, olive oil, evaporated milk and a pinch of salt and a few turns of freshly cracked pepper. Blend for 30 seconds to a minute, scraping down the sides as needed. Give the green sauce a taste and adjust the salt accordingly (this type of cheese tends to be quite salty so you may only need a pinch or two extra).
To Make the Pasta and Assemble:
Meanwhile, bring a pot of salted water to a boil. Drop the pasta in the water and cook according to package’s directions. Drain the pasta, reserving about 1/2 cup of pasta water. Add the pasta back to the pot and pour in the green sauce. Toss the pasta until it's thoroughly coated. Feel free to add a splash or two of pasta water to the pasta to thin the sauce out a bit. Divide between bowls and garnish with some queso fresco crumbles and freshly cracked pepper.
Notes
Options for Serving:The most traditional way to serve this is with a side of pan-fried steak cut into slices. I never grew up with my mom making it this way because she doesn't eat meat so I make it without meat, too! To Store/Freeze: This green sauce will keep in the fridge for up to 3 days. The green sauce freezes very well. Store in a freezer-safe container, label it with its name and date; it will stay good in the freezer for up to 3 months. Thaw in the fridge. And then proceed with using it on pasta. Equipment: Medium Dutch Oven | High-Powered Blender | Tongs |