Sunshine Beef Casserole

Ingredients

• 2 tablespoons olive oil
• 1 1/3 pounds braising beef or stew beef, chopped into chunks
• 2 tablespoons all-purpose flour
• 1/2 teaspoon salt
• 1/2 teaspoon black pepper
• 2 cloves garlic, minced
• 1 (12-ounce) bottle dark ale
• 1 1/2 cups beef stock
• water, to taste
• 1 red bell pepper, chopped
• 1 green bell pepper, chopped
• 1 small zucchini, chopped into chunks
• fresh parsley, to taste, chopped
• 1/4 red onion, thinly sliced
• couscous, to taste, cooked and hot