Brown the stew beef in the pot first (optional). I like to season mine with salt and pepper before I brown it.
Add the vegetable broth, diced potatoes, diced carrots, & tomato sauce. Season with salt and pepper. Bring to a boil, cover, & reduce heat to low/med heat. Cook, stirring occasionally, until the potatoes and carrots are tender.
Add in the corn, green beans, mixed vegetables, & diced tomatoes. Cook for an additional 30 minutes on low. Season with salt & pepper. If you like garlic, switch out the salt for garlic salt instead to season it with.