Crockpot Meatballs with Spinach Mushroom Sauce

ground turkey or beef (I used turkey)

Italian seasoning (or 1/2 tsp. each dried oregano and basil)

onion powder

garlic powder

chili powder

kosher salt

few grinds of black pepper

jar spaghetti sauce

frozen chopped spinach

mushrooms (quartered (I used baby portabellas))

water

box spaghetti or linguine (whole wheat preferred)

shredded mozzarella or grated parmesan (optional)