Look for precooked bacon slices in the deli section of the supermarket.
Pepperoni Breadstick Focaccia: Use pepperoni slices from half of a 3.5-oz package in place of the bacon.
Cheese and Olive Focaccia: Pull 4 sticks of mozzarella string cheese apart into 16 strips. Use strips of cheese in place of bacon. Sprinkle 2 tablespoons sliced kalamata olives (instead of the chopped bacon) on top before baking.