Man, as an Italian, it is hard for me to think of good tomato-based sauces without any sort of pork in them

When I read the title of this thread, I actually wanted to share my FAVORITE sauce, but of course it uses pancetta. However, my friends have made it with vegan bacon (I think beef bacon or turkey bacon would work, too) and said it was great, so I'll share!
Use a big saute pan
Saute your "bacon-like product" on medium until crispy -- for pork, it'll render its own fat, but for other meats, you may need olive oil in the pan
Add diced onion and garlic (about 1 onion and 3 cloves garlic), saute for 1 minute
Throw in some crushed rosemary, chili pepper flakes (optional) and a little red wine (maybe 1/4 cup)
Add a 28 oz can of san marzano tomatoes and crush them up
Saute on medium until the tomato turns orange-y in color (that's the secret to cooking any tomato sauce). About 10 minutes (I cook the pasta while this part happens).
Put your cooked pasta (should be spaghetti for this sauce) directly into the sauce pan and stir, then turn off heat.