For the enchilada sauce:

olive oil spray (I used my Misto)
2 garlic cloves, minced
1 or 2 tbsp chipotle chile in adobo sauce, more if you like it spicy
1-1/2 cups tomato sauce
1/2 tsp chipotle chili powder
1/2 tsp ground cumin
2/3 cup fat-free low-sodium chicken broth
kosher salt and fresh pepper to taste

For the zucchini boats:

4 (about 32 oz total) medium zucchini
1 tsp oil
1/2 cup green onions, chopped
3 cloves garlic, crushed
1/2 cup diced green bell pepper
1/4 cup chopped cilantro
8 oz cooked shredded chicken breast
1 tsp cumin
1/2 tsp dried oregano
1/2 tsp chipotle chili powder
3 tbsp water or fat free chicken broth
1 tbsp tomato paste
salt and pepper to taste

For the Topping:

3/4 cup reduced fat shredded sharp cheddar
chopped scallions and cilantro for garnish