Spinach and Artichoke Dip & Sandwich Melts

butter (or olive oil)

garlic, finely chopped or grated

flour

low fat milk

cream cheese, softened

shredded Monterrey jack cheese

grated Asiago cheese (or parmesan)

Greek yogurt (or sour cream)

crushed red pepper flakes

pepper

large handfuls fresh spinach, chopped

jar (or can) marinated artichokes, drained and chopped

slices sourdough bread

olive oil for grilling