First, make breadcrumbs.
Preheat oven to 350F and line baking sheet with parchment paper.
In a food processor, blend all breadcrumb ingredients until fine crumble.
Pour onto baking sheet and bake for about 8 minutes or until slightly golden.
For the sauce, blend walnuts, garlic, basil, and tomato sauce in food processor until completely smooth.
Meanwhile, make pasta according to package. Drain.
Add the hot pasta back to the pot and add in spinach.
Pour sauce on top of pasta, stir, and heat on low for 5 minutes.
Add breadcrumbs on top of pasta and serve immediately.