Step 1

Prep Tomato: Slice the tomato into thin slabs and lay it on a paper towel. Sprinkle with salt and pepper. Let sit while you gather everything else, then pat slightly dry.

Step 2

Assemble: Build the sandwich by spreading Boursin onto a slice of sourdough, then layering on the tomatoes, basil, and optional spinach, topping with the other slice of bread. In a separate bowl, stir together margarine and garlic. Spread garlic mixture onto the outsides of the sandwich.

Step 3

Cook in a skillet over medium heat until both sides are toasty and golden brown, about 3 to 5 minutes per side.