Add the macaroni, milk, water, butter, salt, and garlic powder to a large high sided skillet
Bring to a boil, then reduce to a simmer and cook, stirring occasionally, until the noodles are al dente, about 10 minutes
Meanwhile, combine the butter, mustard, honey, onion powder, and crackers to make the cracker topping
Season the cracker topping to taste with salt and pepper, and set aside
Add the spinach to the pasta and cook, stirring occasionally, until fully thawed and hot
Add more milk if needed to keep the mixture saucy
Remove from heat, then stir in the cheese until melted
Season to taste with lots of pepper and salt if needed
Top with crumbs and broil on low
Serve
