Given the task definition and input, reply with output. In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Heat about 3 tablespoons olive oil in a saucepan over medium-high heat., Add in onion, diced carrots, celery, both bell peppers, chopped portobello mushroom, dried oregano and crushed red pepper flakes; cook stirring for 4-5 minutes., Add in garlic and cook for 2 minutes., Add in wine and prepared marinara sauce, bring to a simmer stirring., Reduce heat to low and simmer uncovered for 35-40 minutes stirring occasionally., Season sauce with salt and fresh ground black pepper to taste.
onion, carrot, celery, green bell pepper, red bell pepper, portabella mushroom, oregano, red pepper, garlic, red wine, marinara sauce, salt