Chicken Burrito Skillet

1 1/2 pounds boneless, skinless chicken breasts and/or thighs, cut into bite-size pieces
1 cup sweet onions, diced
2 tablespoons gluten-free taco seasoning
1 can (15 oz ) Black Beans, drained, rinsed
2 cups Organic Salsa, regular, mild or hot
2 1/2 cups water
3 cups (12 oz), Barilla Gluten-Free Penne Pasta, uncooked
1 cup shredded Cheddar cheese blend plus extra for garnish
Chopped cilantro, optional garnish
Fresh Avocado, peeled, pitted and diced, optional garnish
fresh lime, optional garnish
sour cream for garnish (make sure to verify a gluten-free brand)
Black olives for garnish (make sure to verify a gluten-free brand)