Favorite Taco Pasta

Ingredients

• 1 pound lean ground beef or turkey
• 1 green bell pepper, diced
• 1 small onion, diced
• 3 tablespoons taco seasoning
• 1 (16-ounce) jar salsa
• 1 (15-ounce) can black beans, drained and rinsed
• 1 1/2 cups chicken stock
• 1/2 (8-ounce) block cream cheese
• 1 cup cheddar cheese, shredded
• 6 cups medium shell pasta, cooked and warm
• avocado, to taste, mashed
• black pepper, to taste
• scallions, to taste, sliced