Homemade Vegan Chili

2 tablespoons olive oil

1 medium onion

chopped

1 medium sweet potato

chopped

1 medium bell pepper

chopped

2 large carrots

chopped

2 stalks celery

chopped

4 cloves garlic

chopped

or more to taste

2 (16 ounce) cans red kidney beans

drained

1 (16 ounce) can diced tomatoes

1 (16 ounce) can black beans

drained

1 (16 ounce) can garbanzo beans

drained

1 tablespoon chili powder

or more to taste

1 teaspoon salt

1 teaspoon ground cumin

or more to taste

1 teaspoon dried oregano

1 large bay leaf

or more to taste