Sauté onions, add garlic.
Add tomato paste and cook for 1 min.
Add tomatoes, cayenne and cook on simmer for approximately 30 minutes.
Cook pasta, heat pan with 1tbsp of olive oil, add walnut meat just to heat through, add 1-2 cups of tomato sauce (more if you like really saucy, less if you like more meaty) to create the bolognese. Add cooked pasta to the sauce and toss to combine. Check for seasoning.
I added in fresh basil, chili flakes, olive oil, and tons of vegan parmesan.