Vegan Pasta alla Vodka (Sorta)

Name: Vegan Pasta alla Vodka (Sorta)
Cuisine: European, Italian, Mediterranean
Ingredients: ¾ cup raw cashews; ¼ cup extra-virgin olive oil, plus more for serving; 1 large onion, thinly sliced; 5 garlic cloves, coarsely chopped; ½ tsp. Diamond Crystal or ¼ tsp. Morton kosher salt, plus more; ½ tsp. crushed red pepper flakes; 1 4.5-oz. tube or ½ cup double-concentrated or regular tomato paste; 1 14.5-oz. can whole peeled tomatoes; 1 lb. short, chunky pasta (such as rigatoni, conchiglie, or casarecce); ¼ cup vodka; Torn basil leaves (for serving); Vegan Parmesan (for serving; optional); Freshly ground black pepper; 1 lemon, sliced into wedges