I canned meatless spaghetti sauce my first year of canning. None of ours ever made us sick! I would recommend following the BALL canning guide on how to do it. Also pressure can if you have the option to- but I did water bath mine.
on the website "animal vegetable miracle " barbara posted her family's recipe for sauce (as well as a way to make a big batch then break that down further to a sweet and sour sauce as well as another sauce.) I did this last year and will be making the marinara again this last saturday in august. ( i had to order 40# of tomatoes from a farmer down the road as ours are a bit slow this year, ours will be happily eaten fresh. ** the recipe link makes a bunch but it was really good and we just opened the last jar the other night for pizza.
Have done meatless in the water bath and with meat (one batch with meatballs) in the pressure canner. Both are yummy and so nice to have on the shelf!!!