Swiss Bliss Roast and Potatoes

Ingredients

• 3 pound roast bottom round, cut 1-inch thick
• 1 envelope onion soup mix
• 1 small can sliced mushrooms, drained
• 1 green pepper, sliced
• 1 large can tomatoes, drained and chopped, reserving liquid
• 4 medium potatoes quartered
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 1 tbsp. steak sauce
• 1 tbsp. cornstarch
• 1 tbsp. dried parsley flakes