savory beef and vegetable soup

Ingredients

• 1 pound choice stew meat, trimmed and cut into 1/2-inch pieces
• 2 tablespoons soy sauce
• 1 tablespoon vegetable oil
• 1 pound cremini mushrooms, stems trimmed, caps cleaned and quartered
• 1 pound red potatoes, cleaned, and diced into 1/2-inch pieces
• 1 large onion, chopped medium (about 1-1/2 cups)
• 2 tablespoons tomato paste
• 1 medium garlic clove, minced or pressed through a garlic press
• 1/2 cup red wine
• 4 cups beef broth
• 1 3/4 cups low-sodium chicken broth
• 2 medium ribs celery cut into 1/2-inch pieces
• 1 package frozen mixed vegetables (carrots, corn, peas & green beans)
• 1 large bay leaf
• 1/8 teaspoon dried thyme