Trim off the brown rim of the toast bread (save them for bread crumbs or other dishes.) Find two stainless steel round cookie cutters about 2-inch in diameter. Taking the four corners of the toast bread, carefully fold the bread into a flower and push into the cookie cutter. Fill each toast cup with ½ tablespoon peanut butter, 1 tablespoon chopped tomato, and 1 tablespoon chopped onion inside. Sprinkle with some dried basil on top of the filling. Bake at 300 degrees Fahrenheit for 2 minutes or until the bread is crispy on the outside. When you remove the toast cup from the cookie cutter, it will maintain the shape of a cup.