Ingredients

• 1 1/3 lbs white potatoes, peeled, sliced thinly
• 1 lb extra lean ground beef
• 1 teaspoon thyme, dried
• 2 teaspoons oregano, dried
• 2 garlic cloves, minced
• salt, pepper to taste
• 1 onion, finely diced
• 3 ounces tomato paste (1/2 can)
• 1 1/4 cups low-fat yogurt, strained to obtain sour cream consistency
• 1 1/2 cups cheddar cheese, shredded
• 1 green bell pepper, finely diced