Cheesy Sausage Nachos
["3/4 lb. bulk pork sausage", "1/4 C chopped onion", "3 C diced fresh tomatoes. divided", "3/4 C picante sauce", "4 C tortillas chips", "3 C (12 oz) shredded Monterey Jack cheese, divided", "1 medium ripe avocado, diced"]
["In a skillet, cook sausage and onion over medium heat until meat is no longer pink, drain well. Add 2 cups tomatoes and picante sauce. Bring to a boil. Reduce heat; simmer, uncovered for 20 minutes or until most of the liquid has evaporated."]
["pork sausage", "onion", "tomatoes", "picante sauce", "tortillas chips", "shredded Monterey Jack cheese", "avocado"]