Start by adding the prepared cheeses, spreads, greens, seasonings, and Jammy Onions to their own small bowls and place them in the center of a large, rectangular board.
Add the bacon and the rest of the produce around the edge of the board, fanning them out around the bowls where possible. I like to arrange my toppings so that one side of the board is sweet and one side is savory to help guide guests!
Serve the bread on the side and make sure there is a stick of salted butter around for cooking.
To cook, spread a generous amount of butter on one side of each piece of bread. Place one slice, butter-side-down, on the pan or press over medium to medium-high heat, add the cheese(s), spread(s), and toppings, then add the other slice on top, butter-side-up. Allow the bottom slice to toast until golden brown and the cheese begins to melt, then flip (carefully!) and toast the other slice until brown and the cheese is gooey.