Cheeseburger Casserole

Bahan-bahan (4 porsi)

• 2 tablespoons olive oil
• 1 small yellow onion (½-inch diced)
• ½ teaspoon kosher salt
• ¼ teaspoon ground black pepper
• 1 pound lean ground beef (I used 93% lean)
• 2 tablespoons tomato paste
• 1 teaspoon garlic powder
• 1 teaspoon Dijon mustard
• 2 to 3 teaspoons hot sauce
• 4 cups reduced sodium beef broth
• 8 ounces whole wheat rotini noodles (or elbow or similar short pasta)
• ½ cup plain nonfat Greek yogurt
• 1 ½ cups grated sharp cheddar cheese (yellow if possible)
• ¼ cup chopped dill pickles (optional)
• ¼ cup chopped green onion
• Water (as needed)