Cheesy Beef Taco Dip

Ingredients

• 2 pounds ground beef
• 1 large onion, finely chopped
• 1 medium green pepper, finely chopped
• 1 pound process cheese (Velveeta), cubed
• 1 pound pepper jack cheese, cubed
• 1 jar (16 ounces) taco sauce
• 1 can (10 ounces) diced tomatoes and green chiles, drained
• 1 can (4 ounces) mushroom stems and pieces, drained and chopped
• 1 can (2-1/4 ounces) sliced ripe olives, drained
• Tortilla chips