tacos in pasta shells

Ingredients

• 1 1/4 pounds ground beef
• 1 package (3 oz.) cream cheese with chives, cubed and softened
• 1 teaspoon salt
• 1 teaspoon chili powder
• 18 - jumbo pasta shells (cooked, rinsed & drained)
• 2 tablespoons butter, melted
• 1 cup prepared taco sauce
• 1 cup (4 oz.) shredded monterey jack cheese
• 1 1/2 cups crushed tortilla chips
• 1 cup dairy sour cream
• 3 - green onions, chopped
• - leaf lettuce (optional)
• - small pitted ripe olives (optional)
• - cherry tomatoes (optional)