Welsh Rarebit with Spinach

INGREDIENTS

• 4 slices of good, sturdy bread (i used a very nice gluten free flax seed bread by glutino - any will do, but please, no wonderbread!)
• 1/2 teaspoon of Colman's mustard powder (or 1 teaspoon of a milder mustard)
• 1/2 teaspoon worcestershire sauce
• 2 cups of fresh spinach or 1/2 cup frozen.
• dash of milk (probably about a teaspoon)
• a little ground black pepper
• 1 cup of grated cheddar cheese (I used Denhay English cheddar)