Good-Cooking - All American Pot Roast

Ingredients

• 1/4 cup vegetable oil
• 1 (4 pound) boneless beef chuck roast
• 1 cup chopped onion
• 1 cup sliced celery
• 2 cloves garlic, minced or pressed
• 3 cups beef bouillon
• 1/4 cup catsup
• 1 teaspoon salt
• 1/2 teaspoon dried thyme leaves
• 1/4 teaspoon pepper
• 6 medium potatoes, peeled and quartered
• 4 carrots, peeled and cut into 2-inch pieces
• 1/2 pound green beans
• 1/4 cup cornstarch
• 1/4 cup water