1. Cook pasta in large saucepan of salted water according to package directions. Drain; reserve pasta water. 2. Melt butter in large saucepan over medium heat. Add bell pepper. Cook until pepper is tender, about 6 minutes. Add soup, 12 soup can of reserved pasta water and cheese. Stir until melted, about 8 minutes. 3. Add chicken, cooked pasta and pepper; stir. Top with bacon and scallions, if desired. 4. Combine ranch dressing and salsa in a large bowl. Toss with lettuce. Serve salad chilled or at room temperature along side of Mac 'n' Cheese.