Chili and Cheese Ham Strata

slices sourdough bread ((1 inch thick))

butter (, softened)

shredded cheddar cheese, divided

cubed fully cooked ham ((about 8 oz - you want a ham steak cubed not deli ham))

((4 ounces) chopped green chilies)

finely chopped onion

minced fresh cilantro

eggs

milk

salt

ground cumin

ground mustard