Annie's famous vegetable soup

This is the recipe that I make so much of I can't find a pot big enough. You may want to scale down on my quantities. I am guessing this makes about 12 serves.

2 yellow squash
2 small zucchini
1/2 white or red onion
6 mushrooms
12 broccoli florets
1 stalk celery
1 can stewed tomatoes
2 cups chicken broth
4 cups V8 vegetable juice
1 tbsp olive oil
2 tbsp vegetable seasoning
2 tsp salt
2 tsp pepper
2 tsp garlic powder
optional: 2 tsp cayenne pepper or a couple shakes of hot sauce

Slice all veggies. Saute onions, mushrooms, broccoli, and celery in olive oil over medium heat. Add in all spices and stir. Add remaining veggies, chicken broth, and V8 juice. Cover and cook on low heat for 45 minutes. Serve with grilled cheese sandwiches.