Tomato-&-Avocado Cheese Sandwich

Lay bread on work surface. Spread avocado on one slice. Top with tomatoes and sprinkle with cheese. Toast both pieces of bread in a toaster oven until the plain piece is toasted and the cheese is starting to melt on the topped piece, 4 to 6 minutes.

Remove the toast from the toaster oven with a spatula, and mound greens (or spinach) on top of the cheese side. Drizzle with vinegar and top with the remaining toast. Cut in half if desired and serve with pear.