The Perfect Tomato Sauce, a big batch cook, and the Base for my Fajitas/ Bolognaise/ Chilli

Discussion on plant based versions of familiar recipes, personal and planetary benefits of a plant based diet, my knives, different ways to chop an onion.
This big batch whole food plant based no oil tomato base can also be used as a base for curry, alone on pizzas or tossed with pasta.
Ingredients:
2-3 onions
3 sticks celery
3 carrots
6 cloves garlic
3 peppers ( I use red or green)
3 tins plum tomatoes
2 healed tablespoons tomato puree
black pepper