Grilled Taco Nachos

5 cups tortilla chips
1 can (15 oz) black beans, drained, rinsed and mashed
1 can (4.5 oz) chopped green chiles, drained
2 tsp. taco seasoning mix
2 Roma tomatoes, chopped
2 medium green onions, sliced
2 cups finely shredded Colby-Monterey Jack cheese blend

Heat gas or charcoal grill. Spray 12x18-inch foil pan with cooking spray. Spread tortilla chips in pan. In medium bowl, mix beans, chiles and taco seasoning mix; spoon evenly over tortilla chips. Top with tomatoes and onions. Sprinkle with cheese. Cover pan with foil.

Place foil pan on grill over medium heat. Cover grill; cook 8 to 10 minutes or until cheese is melted. Carefully remove foil garnish with sour cream and guacamole.