Three Bean Vegan Chilli

Disclaimer: measure to taste.
The batch I made is enough to feed the Brady Bunch cast and crew, so I'll try to translate to a normal batch…

1 Tbsp olive oil

2 x 796 ml (big) cans of diced tomatoes
1 Big can of crushed tomatoes
1 Medium yellow onion (diced)
1 Large (or 2 small) garlic cloves minced (especially encourage local'ish on this ingredient)
1 Red bell pepper diced
1 Small zuchini diced
1 Cup of frozen corn
1 Cup of diced mushrooms
2 stalks of celery
1 Can of red kidney beans
1 Can of black beans
1 Can of Roman beans (wonderful mistake - thought they were chick peas)
1/4 Tsp of italian spice blend
1 Heaping tbsp of chilli powder
1 Tbsp of cumin
Salt and pep to taste