Salsa with seasoning

8 cups tomatoes (peeled and cut into small pieces) 8 -10 jalapeno peppers 3 onions 2 stalks celery (the whole stalk, not 2 ribs) 4 bell peppers (any colors)[...]

12 large red bell peppers olive oil , for coating the peppers plus 2 tablespoons (or as needed) 4 serrano chilies 2 cloves garlic , thinly sliced 1 tablespoon[...]